{"title":"CYLINDER KITS","description":" ","products":[{"product_id":"big-bore-cylinder-kit-scooter-60cc","title":"Big Bore Cylinder Kit Scooter 60cc","description":"BRAND NEW - 60cc Big Bore Kit   This kit fits most Chinese Scooters\/Mopeds with 50cc 2-Stroke engines!!!  Included in this big bore set is:  1x Cylinder Head 1x Piston 1x Wrist Pin 2x Head Gaskets Complete Ring Set   ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091830136943,"sku":"PSTN-0094-U1","price":43.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/bigborekit.jpg?v=1778735063"},{"product_id":"80cc-big-bore-head-cylinder-kit-gy6-64mm","title":"80cc Big Bore Head \u0026 Cylinder Kit, GY6 64mm","description":"80cc Big Bore Kit with \u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003e64mm \u003c\/span\u003eValve Head Assembly\u003cdiv\u003eFor scooters with 139QMB or 139QMI engines Scooter \u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eBefore ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091832463471,"sku":"PSTN-0103-U1","price":52.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/pstn-bbk.jpg?v=1778735080"},{"product_id":"100cc-big-bore-head-cylinder-kit-gy6-64mm","title":"100cc Big Bore Head \u0026 Cylinder Kit, GY6 64mm","description":"100cc Big Bore Kit with \u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003e64mm \u003c\/span\u003eValve Head Assembly\u003cdiv\u003eFor scooters with 139QMB or 139QMI engines Scooter \u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eBefore ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091836657775,"sku":"PSTN-0114-U1","price":52.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/pstn-bbk_783d13aa-cc9f-4f36-812e-b5bbc2149000.jpg?v=1778735095"},{"product_id":"100cc-big-bore-head-cylinder-kit-gy6-cylinder-piston-rings-for-4-stroke-gy6-qmb139-engines","title":"100cc Big Bore Head \u0026 Cylinder Kit Gy6 Cylinder, Piston \u0026 Rings for 4-stroke Gy6\/QMB139 Engines","description":"\u003cdiv\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your ride with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap Big Bore Kit 100cc GY6\u003c\/span\u003e, specifically engineered to enhance power, acceleration, and engine efficiency in your 4-stroke GY6\/QMB139 motor. With a 52.4mm cylinder bore, this high-performance kit delivers a noticeable improvement in torque and top speed, making it the perfect choice for anyone looking to get more out of their scooter, moped, or small motorcycle. Whether you're cruising through city streets or pushing your machine to the limit, this kit provides reliable, long-lasting performance backed by precision-machined components and durable construction.\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eDesigned for compatibility with most Chinese 50cc to 100cc GY6 engines, including TaoTao, Roketa, Jonway, Baotian, Peace, and Baccio models, this complete upgrade kit includes a 100cc cylinder, piston and ring set, wrist pin, circlips, base gasket, and head gasket (head not included). The easy installation process makes it ideal for both seasoned mechanics and DIY enthusiasts. Built to handle demanding conditions, the RedCap Big Bore Kit ensures a tight fit, improved compression, and efficient fuel combustion, giving your engine a new life with improved responsiveness and power output.\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eThis kit fits most Chinese scooters and mopeds using GY6\/QMB139 4-stroke 50cc–60cc engines. Compatible with popular brands and models, it offers a versatile and cost-effective way to boost engine output without replacing the entire engine, perfect for performance tuners and riders alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerformance Boost: \u003c\/span\u003eTake your ride to the next level with this 100cc Big Bore Kit designed for GY6\/QMB139 engines. The increased displacement dramatically enhances acceleration, torque, and top-end speed, transforming a standard 50cc or 60cc engine into a high-performance machine ideal for both commuting and recreational riding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eImproved Compression: \u003c\/span\u003eIncludes piston rings designed to deliver superior compression for improved combustion efficiency and power output. The wrist pin and circlips lock everything in securely, reducing engine knock and vibration while maximizing the engine’s smoothness and consistency under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eEngineered from high-grade aluminum alloy and built to withstand high temperatures and pressure, this kit includes a precision-machined cylinder, piston, and ring set. The durable construction ensures long-term reliability and minimizes wear, even under aggressive or extended use on roads and tracks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eHassle-Free Installation: \u003c\/span\u003eDesigned for plug-and-play convenience, the Big Bore Kit comes with everything you need—cylinder, piston, rings, wrist pin, circlips, base gasket, and head gasket (head not included). Ideal for both professional mechanics and DIY enthusiasts looking for a quick, effective performance upgrade.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston \u0026amp; Ring Set\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirq Clips\u003c\/li\u003e\n\u003cli\u003eHead Gasket\u003c\/li\u003e\n\u003cli\u003eBase Gasket\u003c\/li\u003e\n\u003cli\u003eHEAD NOT INCLUDED\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eFits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv\u003e \u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091976249455,"sku":"CYLD-0100","price":39.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/bigborekit_a78f0576-36a6-4f57-8d8f-d6466604cf3a.jpg?v=1778735842"},{"product_id":"80cc-big-bore-head-cylinder-kit-gy6-69mm","title":"80cc Big Bore Head \u0026 Cylinder Kit, GY6 69mm","description":"80cc Big Bore Kit with \u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003e69mm \u003c\/span\u003eValve Head Assembly\u003cdiv\u003eFor scooters with 139QMB or 139QMI engines Scooter \u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eBefore ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091981099119,"sku":"PSTN-0104-U1","price":52.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/pstn-bbk_1b6db38b-1b12-49d6-930f-57cc43e8afcd.jpg?v=1778735874"},{"product_id":"100cc-big-bore-head-cylinder-kit-gy6-69mm","title":"100cc Big Bore Head \u0026 Cylinder Kit, GY6 69mm","description":"100cc Big Bore Kit with \u003cspan style=\"font-weight: bold; text-decoration: underline;\"\u003e69mm \u003c\/span\u003eValve Head Assembly\u003cdiv\u003eFor scooters with 139QMB or 139QMI engines Scooter \u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eBefore ordering please ensure you order the BBK with the correct length Valves for your Head Assembly. You head should look like one of the 2 in the 2nd picture.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53091986604143,"sku":"PSTN-0115-U1","price":49.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/pstn-bbk_602f4d79-bbc8-4df6-aaf4-5bdd8386a332.jpg?v=1778735890"},{"product_id":"head-and-cylinder-rebuild-kit-150cc-gy6-scooters-engine","title":"Head and Cylinder Rebuild Kit 150cc GY6 Scooters Engine","description":"Head and Cylinder Rebuild Kit 150cc GY6 Scooters Engine  ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092121706607,"sku":"PSTN-0119","price":82.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0150-kit-01_01.jpg?v=1778736693"},{"product_id":"gy6-atv-quad-gas-moped-scooter-engine-big-bore-kit-50cc-to-85cc","title":"Gy6 Atv Quad Gas Moped Scooter Engine Big Bore Kit 50cc to 85cc","description":"BIG BORE KIT For GY650cc to 80ccIncludes everything in the picture","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092121837679,"sku":"PSTN-0113-U2","price":38.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/b005hgpfhk.jpg?v=1778736708"},{"product_id":"cylinder-for-short-intake-manifold-2-stroke-bike-engine-kit","title":"Cylinder for Short Intake Manifold, 2-Stroke, Bike Engine Kit","description":"\u003cspan style=\"font-size: 14pt;\"\u003e80cc Cylinder Body\u003c\/span\u003e\u003cspan style=\"font-size: 19px;\"\u003e for Short Intake Manifold, 2-Stroke, Bike Engine Kit\u003c\/span\u003e\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eIntake Stud spacing: 36mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eExhaust Stud spacing: 41mm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(255, 0, 0); font-size: 19px;\"\u003e(This Cylinder is used with the Short\/Straight intake manifold below)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"\" border=\"0px\" src=\"assets\/images\/exhs-0011a_thumbnail.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-size: 19px; color: rgb(255, 0, 0);\"\u003eIf you need the cylinder for the Bent\/Angled intake manifold \u003ca href=\"http:\/\/unitedexpressdist.3dcartstores.com\/product.asp?itemid=666\"\u003e\u0026lt;Click Here\u0026gt;\u003c\/a\u003e\u003c\/span\u003e \u003c\/div\u003e \u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092132126831,"sku":"CYLD-0080-U1","price":30.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0080a.jpg?v=1778737232"},{"product_id":"50mm-bore-cylinder-block-compatible-with-110cc-4-stroke-atv-dirt-bike-pit-bike-fits-1p52fmh-engines-for-chinese-atc-ct-xr","title":"50mm Bore Cylinder Block Compatible with 110cc 4-Stroke ATV Dirt Bike Pit Bike Fits 1P52FMH Engines For Chinese ATC CT XR","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003eGive your 110cc engine the power boost it deserves with the \u003cspan style=\"font-weight: bold;\"\u003e50mm Bore Cylinder Block, \u003c\/span\u003eengineered specifically for 1P52FMH 4-stroke horizontal engines. Whether you're riding an ATV, dirt bike, pit bike, or go-kart, this cylinder block is designed to deliver reliable performance and durability on even the toughest terrains. It’s the perfect solution for restoring lost compression, improving combustion efficiency, and enhancing overall engine output. Compatible with a wide range of Chinese off-road and racing vehicles, including ATC, CT, XR, Mini Choppers, Dune Buggies, and Super Pocket Bikes, this upgrade offers a seamless fit and OEM-level reliability.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eBuilt from high-quality, heat-resistant materials, the 50mm Bore Cylinder Block is made to withstand high-RPM conditions and off-road stress. Precision machining ensures proper alignment and tight tolerances, reducing friction and increasing the life span of your engine. Whether you're replacing a damaged cylinder or upgrading for more power, this component is a reliable choice for riders who want peak performance without compromising durability. With quality, you can count on smoother starts, better throttle response, and a more dependable engine, ride after ride.\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit:\u003c\/span\u003e Designed to OEM specifications, the 52mm Cylinder Kit offers a precise fit for 90cc to 110cc 4-stroke horizontal engines like the 1P52FMH. Whether you're rebuilding or upgrading, this kit improves combustion efficiency and delivers reliable power and compression across all terrains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eCompatible with a wide range of Chinese ATVs, dirt bikes, and go-karts, including TaoTao, Kazuma, Redcat, Roketa, Sunl, Coolster, and Honda CRF clones. A go-to solution for riders needing a performance-ready replacement part for pit bikes, mini-choppers, and dune buggies using Honda-style horizontal engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBoosted Engine:\u003c\/span\u003e The 52mm bore increases cylinder volume and airflow, improving throttle response, torque, and horsepower. This upgrade offers smoother acceleration and stronger engine output without compromising engine reliability—ideal for trail rides, off-road racing, or daily recreational use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eManufactured from premium materials that resist heat and wear, the cylinder is built to perform under stress. Perfect for rugged environments and high RPM conditions, it ensures long-term durability and consistent engine performance on dirt tracks or hilly trails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e Includes everything needed for a straightforward rebuild, with direct OEM-style fitment. No special machining required, install with standard tools, and get your vehicle back in action quickly. Perfect for DIY mechanics and professionals seeking a quick, effective upgrade for their off-road machine.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBore Diameter: \u003c\/span\u003e50mm\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eIt is universal for most Chinese 110cc ATVs, Pit Dirt Bikes, and Go Karts. \u003c\/li\u003e\n\u003cli\u003eThis fits the Chinese ATC, ATVs, CT, XR, Dirt Bikes, Dune Buggies, Karts, Mini-Choppers, and Super Pocket Bikes.\u003c\/li\u003e\n\u003cli\u003eThis engine is commonly found on Dirt Bikes, Pit Bikes, ATVs, and other racing or off-road vehicles made by Kazuma, Tao Tao, Sunl, Redcat, Roketa, Honda CRF, and many more.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092136255599,"sku":"CYLD-0110-U1","price":32.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0110_01.jpg?v=1778737812"},{"product_id":"80cc-cylinder-assembly-for-long-bent-angled-intake-manifold-2-stroke-60cc-80cc-engine-bike","title":"80cc Cylinder Assembly for Long Bent Angled Intake Manifold 2-Stroke 60cc 80cc Engine Bike","description":"\u003cspan style=\"font-size: 14pt;\"\u003e80cc Cylinder Body\u003c\/span\u003e\u003cspan style=\"font-size: 19px;\"\u003e for Long Intake Manifold, 2-Stroke, Bike Engine Kit\u003c\/span\u003e\u003cdiv\u003e\n\u003cspan style=\"font-size: 19px;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cdiv\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eRedCap's 80cc Cylinder Assembly\u003c\/span\u003e boasts a long bent angled intake manifold, tailored for 2-stroke bike engines. Crafted from durable aluminum alloy, it provides reliability and longevity on the road. With intake stud spacing at 33mm and exhaust stud spacing at 41mm, installation is straightforward and ideal for a Chinese 80cc engine Motorcycle. This cylinder body is engineered to improve engine efficiency and power output, providing a seamless integration for a more exhilarating biking experience.\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eFitment: \u003c\/span\u003eTailored specifically for Chinese 80cc engine bikes, this cylinder assembly provides seamless integration and peak performance. Its design precision make certain that your engine operates at its best, delivering optimal power and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eIntake Manifold: \u003c\/span\u003eThe long bent angled intake manifold of this assembly is meticulously crafted to optimize airflow. Its specialized design provides that your engine receives a consistent flow of air, resulting in improved performance and a more exhilarating riding experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eInstalling this cylinder assembly is a breeze, facilitating a swift and hassle-free setup process. With such accurate measurements, you can efficiently complete the installation, enabling you to resume your biking adventures with minimal downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction:\u003c\/span\u003e Crafted from premium materials, this cylinder body is engineered to endure the demands of frequent riding, providing sustained durability and dependable performance throughout your journeys. Its robust construction ensuring longevity and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDimension: \u003c\/span\u003eWith intake stud spacing set at 33mm and exhaust stud spacing at 41mm, this cylinder assembly ensures precise alignment for seamless installation onto your bike's engine. These specific measurements provide a secure fit, enabling optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eDetails:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eIntake Stud spacing: 33mm\u003c\/li\u003e\n\u003cli\u003eExhaust Stud spacing: 41mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote:\u003c\/span\u003e This Cylinder is used with the Bent\/Angled intake manifold.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size: 14pt; color: rgb(255, 0, 0);\"\u003e(This Cylinder is used with the Bent\/Angled intake manifold below)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cimg alt=\"\" border=\"0px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/exhs-0012a_thumbnail.jpg?v=1778738808\"\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-size: 14pt; color: rgb(255, 0, 0);\"\u003eIf you need the cylinder for the short intake manifold \u003ca href=\"http:\/\/unitedexpressdist.3dcartstores.com\/product.asp?itemid=510\"\u003e\u0026lt;Click Here\u0026gt;\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092145234031,"sku":"CYLD-0081-U1","price":30.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0080a_84f77919-e990-49c0-9866-ca7be8bdfadd.jpg?v=1778738819"},{"product_id":"180cc-big-bore-head-cylinder-kit-gy6","title":"180cc Big Bore Head \u0026 Cylinder Kit, GY6","description":"\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eIncludes:\u003c\/span\u003e\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eCylinder, 61 mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003ePiston\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eClips\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003ePiston pin\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eHead gasket and base gasket\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eHead \u003c\/span\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eBig valve non emissions head\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eA9 Camshaft\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003eHead comes with performance springs, retainers and keepers intake valve is 27 mm, exhaust is 23 mm. Performance A9 cam included. Your current cylinder must be style A for this kit to work. If the fins on your cylinder look different than the one in the picture then the kit may not work. May require the case to be milled. The OD of the bottom of the cylinder is 65 mm.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 10pt; color: rgb(51, 51, 51);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003ePlease NOTE: If you open the gaskets, if you install the rings, if the kit is installed in anyway you CANNOT return it.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(51, 51, 51); font-family: verdana, arial, helvetica, sans-serif; font-size: small; background-color: rgb(255, 255, 255);\"\u003ePlease be sure of what you're buying. Any returned kits will be subject to a 20% restocking charge.\u003c\/span\u003e\u003cspan style=\"font-family: verdana, arial, helvetica, sans-serif; font-size: 10pt; color: rgb(51, 51, 51);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003eCamshaft Timing \u0026amp; Valve Adjustment\u003c\/div\u003e\n\u003cdiv\u003e\u003col\u003e\n\u003cli\u003eSet the engine to TDC (piston is all the way at the top of the cylinder).\u003c\/li\u003e\n\u003col\u003e\n\u003cli\u003eRemove the spark plug and the small rubber plug on top of the flywheel cover, so that you can look down the hole at the fly wheel.\u003c\/li\u003e\n\u003cli\u003eUsing a 14mm socket, turn the fly wheel until you see the letter T on the fly wheel line up with a line that has been cast in the case.\u003c\/li\u003e\n\u003cli\u003eThe piston should now be at TDC.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cli\u003eThe camshaft will have one large hole at 12 o' clock and a small hole or line at 3 o' clock and 9 o' clock.\u003c\/li\u003e\n\u003cli\u003eSet the cam in the cradle with the large hole facing outward, and line the two small holes or line with the top of the cylinder head. (see fig 1.)\u003cimg src=\"https:\/\/www.monstergy6.com\/tech_cam_timing.JPG\" style=\"text-align: center;\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eTilt the camshaft and slide the cam chain over the gear. \u003c\/li\u003e\n\u003cli\u003eUnlock the lock nut on the tappet. Using a feeler gauge adjust the valves to .004 mm clearance. Lock the lock nut into place.\u003c\/li\u003e\n\u003c\/ol\u003e\u003c\/div\u003e \u003c\/div\u003e \u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092154048623,"sku":"PSTN-0120-U1","price":87.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/pstn-0120a.jpg?v=1778739363"},{"product_id":"studs-intake-and-exhaust-for-gy6-50cc-to-150cc","title":"Studs, Intake and Exhaust for GY6 50cc to 150cc","description":"Studs, Intake and Exhaust for GY6 50cc to 150cc    ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092161683567,"sku":"STUD-0100","price":3.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/STUD-0100a.jpg?v=1778739587"},{"product_id":"big-bore-cylinder-kit-180cc-gy6-engine","title":"Big Bore Cylinder Kit, 180cc GY6 Engine","description":"\u003cp\u003e180cc Big Bore Kit for GY6 ATV Scooter Moped Bottom End Only 61mm\u003c\/p\u003e\u003cp\u003eDetails\"\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStud Spacing: 54mm\u003c\/li\u003e\n\u003cli\u003eCylinder sleeve ID: 61 mm\u003c\/li\u003e\n\u003cli\u003eCylinder sleeve OD: 64 mm\u003c\/li\u003e\n\u003cli\u003eIncludes: Cylinder, 61 mm piston, clips, piston pin, head gasket and base gasket, \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIf the fins on your cylinder look different than the one in the picture then the kit may not work.\u003cbr\u003eMay require the engine block\/case to be milled.\u003c\/p\u003e\u003cp\u003eNOTE: If you open the gaskets, if you install the rings, if the kit is installed in anyway you CANNOT return it.\u003c\/p\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092164599919,"sku":"CYLD-0180-U1","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0180a.jpg?v=1778739779"},{"product_id":"cylinder-and-piston-kit-50cc-gy6","title":"Cylinder and Piston Kit, 50cc GY6","description":"Cylinder and Piston Kit, 50cc GY6 ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092203364463,"sku":"CYLD-0050-U1","price":39.57,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0050_01.jpg?v=1778741696"},{"product_id":"39mm-cylinder-assembly-compatible-49cc-50cc-gy6-4-stroke-139qmb-engine-for-chinese-atv-dirt-bike","title":"39mm Cylinder Assembly Compatible 49cc 50cc GY6 4-Stroke 139QMB Engine for Chinese ATV Dirt Bike","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your young rider’s off-road experience with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 39mm Cylinder Assembly, \u003c\/span\u003especifically designed for the Kazuma Meerkat and Redcat 50cc Kids ATV Quad. This high-quality assembly is built from premium-grade materials that ensure durability, heat resistance, and long-term performance in tough trail conditions. Whether it’s replacing a worn-out cylinder or boosting performance, this kit is engineered to deliver reliable power and smoother rides. With precise OEM-spec fitment, it seamlessly integrates into your existing engine setup, making installation a breeze, even for DIYers.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eThis cylinder assembly isn’t just about replacement—it’s about enhancement. It optimizes combustion efficiency for improved torque and acceleration, giving your little adventurer a more responsive and exciting ATV experience. The RedCap Cylinder Assembly is corrosion-resistant and heat-tested to handle the demands of active kids and varied terrains. Perfect for parents looking for a dependable, easy-to-install upgrade that keeps young riders safe and thrilled on every ride.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eDesigned to meet exact OEM specifications, this cylinder assembly offers a seamless fit with 49cc–50cc GY6-style engines. No special tools or modifications are required, making installation fast and simple for both DIY enthusiasts and professional mechanics to get back on the trail in no time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eThis RedCap 39mm Cylinder Assembly is compatible with a range of 49cc–50cc kids ATVs and dirt bikes, including Kazuma Meerkat, Redcat, TaoTao, SunL, Roketa, and more Chinese 4-stroke GY6 engine variants using 139QMB layouts, making it a versatile and valuable part upgrade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEnhanced Engine: \u003c\/span\u003eMaximize your ATV’s power with this performance-enhancing cylinder assembly that optimizes combustion and airflow. Whether climbing hills or racing on flat tracks, it delivers improved throttle response, smoother acceleration, and a more powerful riding experience for young adventurers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eManufactured using premium-grade alloy materials, the RedCap 39mm Cylinder Assembly delivers exceptional strength and wear resistance. Designed to endure off-road abuse, high temperatures, and long hours of use, it ensures dependable performance for young riders on Kazuma Meerkat or Redcat 50cc ATVs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eEngineered for longevity, the cylinder is resistant to wear, corrosion, and high operating temperatures. This reliability makes it a trusted upgrade or replacement part for parents seeking peace of mind while their kids enjoy safe, uninterrupted ATV fun on rugged or bumpy terrain.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBore Size: \u003c\/span\u003e39mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eFitment Type: \u003c\/span\u003eDirect replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eKazuma Meerkat 50cc, Redcat 50cc Kids ATV Quad, Chinese 49cc–50cc 4-stroke ATVs and kids’ quad bikes using 139QMB engine layouts, TaoTao, SunL, Roketa, Jonway, Baja, and more\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092205658223,"sku":"CYLD-0051","price":43.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0051_01.jpg?v=1778741713"},{"product_id":"cylinder-piston-rings-gasket-set-72cc-70cc-atv","title":"Cylinder, Piston, Rings \u0026 Gasket Set 72cc  70cc ATV","description":"Cylinder, Piston, Rings \u0026amp; Gasket Set 72cc - 70cc ATV ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092206444655,"sku":"CYLD-0070-U1","price":43.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0070_01.jpg?v=1778741730"},{"product_id":"cylinder-only-bbk-80cc-gy6","title":"Cylinder ONLY, BBK 80cc GY6","description":"Cylinder ONLY, BBK 80cc GY6","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092207165551,"sku":"CYLD-0078-U1","price":21.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0078_02.jpg?v=1778741746"},{"product_id":"47mm-big-bore-cylinder-head-with-piston-rings-rebuild-kit-for-bbk-80cc-4-stroke-gy6-qmb139-scooters-engines","title":"47mm Big Bore Cylinder Head with Piston Rings Rebuild Kit - for BBK 80cc 4-stroke GY6\/QMB139 Scooters Engines","description":"80cc Big Bore Kit This kit fits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003cdiv\u003e\n\u003cbr\u003e\u003cdiv\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003eUpgrade your motorcycle engine with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 61mm Big Bore Cylinder Head and Piston Rings Rebuild Kit\u003c\/span\u003e, tailored for GY6 engines from 170cc to 200cc. Designed specifically for engines with 57mm stud spacing (Type K-Block), this kit is crafted from durable aluminum alloy for enhanced longevity and performance. Enjoy increased displacement and power, perfect for enthusiasts looking to boost their bike's capabilities. Ensure seamless installation and reliable operation with components built to withstand rigorous use and deliver optimal performance on the road.\u003c\/p\u003e\n\n\u003cul style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eComplete Big Bore Kit:\u003c\/span\u003e Enhance your engine with our Complete Big Bore Kit, featuring essential components for a comprehensive upgrade: cylinder, piston \u0026amp; ring set, wrist pin, circlips, head gasket, and base gasket. Designed for easy installation and optimized performance, this all-inclusive kit provides everything you need to elevate your engine’s power and efficiency. Ideal for enthusiasts seeking to maximize their vehicle’s performance potential.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eVersatile Design:\u003c\/span\u003e Versatile in design, our Complete Big Bore Kit is meticulously crafted to suit both 80cc 4-stroke GY6\/QMB139 engines, delivering substantial enhancements in power and performance. This kit provides a flexible solution to amplify your engine's capabilities. Enjoy noticeable gains in speed and efficiency with components tailored for precise fit and peak performance. Elevate your vehicle with our comprehensive kit.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eOptimal Performance: \u003c\/span\u003eAchieve peak performance with our Complete Big Bore Kit, seamlessly compatible with stock carburetors for straightforward installation and immediate performance upgrades. To optimize results, monitor your spark plug and consider utilizing larger jets to fully exploit performance and longevity benefits. This method finely tunes your engine, unlocking optimal power and efficiency gains. Providing it operates at its highest potential.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eCompatibility:\u003c\/span\u003e Our Complete Big Bore Kit is engineered to be compatible with a broad spectrum of Chinese scooters and mopeds, offering versatility across various models. Whether you ride a well-known brand or a lesser-known make, this kit provides effortless integration and improved performance. Benefit from a universal upgrade solution that accommodates diverse models, delivering the power and reliability you demand.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eGood Quality Components: \u003c\/span\u003eCrafted to exacting standards, our Complete Kit features high-quality components designed for durability, reliability, and extended lifespan of your scooter or moped engine. Each part is meticulously manufactured with precision and attention to detail, ensuring superior quality and performance. Rest assured that our upgrade will keep your ride running smoothly and reliably, providing consistent power and efficiency.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; list-style-position: outside; list-style-image: none; margin: 15px 0px; padding: 0px 0px 0px 40px; line-height: 1.6; color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDiameter:\u003c\/span\u003e 47mm (53.2mm)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncluded:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; list-style-position: outside; list-style-image: none; margin: 15px 0px; padding: 0px 0px 0px 40px; line-height: 1.6; color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston \u0026amp; Ring Set\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirclips\u003c\/li\u003e\n\u003cli\u003eHead Gasket\u003c\/li\u003e\n\u003cli\u003eBase Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; list-style-position: outside; list-style-image: none; margin: 15px 0px; padding: 0px 0px 0px 40px; line-height: 1.6; color: rgb(51, 51, 51); font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cli\u003e80cc Big Bore Kit This kit fits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eNote:\u003c\/span\u003e Please carefully check the goods' appearance, size, and shape and compare your original goods before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cbr\u003e\u003cdiv\u003eWhile this kit works with the stock carburetor, to get the best performance you should always read you spark plug to know if larger jets would give better performance and longevity to you big bore kit.\u003c\/div\u003e\n\u003cdiv\u003e\u003ca href=\"product.asp?itemid=1773\"\u003eClick this link for the a set of jets.\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"Piston ring order\" border=\"0px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PistonRingOrder.jpg?v=1778741755\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e \u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092208181359,"sku":"CYLD-0079-U1","price":38.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/bigborekit_c92e44c7-2659-4bbf-8569-4531e21556c8.jpg?v=1778741765"},{"product_id":"cylinder-atv-90cc-47mm","title":"Cylinder, ATV 90cc 47mm","description":"Cylinder ATV for 90cc Engine\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eInside Diameter: 47mm\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092208935023,"sku":"CYLD-0090-U1","price":21.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0090_01.jpg?v=1778741781"},{"product_id":"54mm-bore-cylinder-rebuild-kit-with-piston-rings-gaskets-pin-compatible-with-125cc-4-stroke-chinese-engines","title":"54mm Bore Cylinder Rebuild Kit with Piston Rings Gaskets Pin Compatible with 125cc 4-Stroke Chinese Engines","description":"\u003cdiv style=\"\"\u003e\u003cdiv style=\"\"\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003eRestore the power and performance of your 125cc ride with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 54mm Bore Cylinder Rebuild Kit,\u003c\/span\u003e specifically designed for Chinese ATVs, dirt bikes, and go-karts using 1P54FMI horizontal engines. Whether you're riding a TaoTao, Kazuma, Redcat, Coolster, Sunl, or even a Honda CRF-style clone, this top-end rebuild kit delivers a significant performance upgrade. It includes a precision-engineered 54mm cylinder, matching piston, rings, gaskets, and wrist pin—everything you need to revive worn-out engines and boost combustion efficiency. With OEM-level compatibility and construction, this kit ensures smoother starts, stronger throttle response, and consistent power delivery.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003eMade with high-grade, heat-resistant materials, the RedCap 54mm kit is built to endure the harsh demands of off-road riding and high-RPM performance. Its carefully measured dimensions—54mm inner diameter, 58mm outer diameter, and 93.2mm total height—guarantee a perfect fit and long-term durability. Designed for both DIY mechanics and professionals, this rebuild kit allows for easy, no-hassle installation without needing major modifications. From casual trail riding to competitive racing, this kit gives your 125cc engine the boost it needs to perform at its peak, reliably, powerfully, and ready for any challenge.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eThis RedCap 54mm Cylinder Kit is designed with precise dimensions 54mm inner diameter, 58mm outer diameter, 69.5mm middle height, and 93.2mm total height—ensuring a perfect OEM-style fit. The 39.5mm piston with 14mm wrist pin and 2.5mm dome height delivers seamless integration and optimal compression performance for smooth starts and consistent power output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eBuilt to fit a wide range of 125cc Chinese models such as TaoTao, Kazuma, Redcat, Coolster, Sunl, Honda CRF, and other go-karts and dirt bikes with 1P54FMI horizontal engines. This kit ensures a reliable match with most popular off-road vehicles, making it an excellent replacement for worn-out top ends or a performance upgrade for sluggish engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eComplete Rebuild Kit: \u003c\/span\u003eIncludes everything needed for a complete top-end rebuild: 54mm bore cylinder, piston, piston rings, wrist pin, and gaskets, all manufactured to meet or exceed OEM specifications. Whether you're restoring power or refreshing your ride after wear and tear, this all-in-one solution saves time and effort during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eMade from high-quality, heat-resistant materials, this RedCap kit is built to handle extreme temperatures, high RPMs, and tough off-road use. Its rugged durability ensures longevity under stress, making it the ideal choice for riders who demand dependable, long-lasting performance in rugged environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e With accurate sizing and quality-tested parts, this cylinder kit is designed for straightforward installation using basic tools, no need for professional machining or tuning. Ideal for DIY mechanics and power sport enthusiasts, the user-friendly design ensures you’ll be back on the trail or track in no time with noticeable performance gains.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eMiddle Height:\u003c\/span\u003e69.5mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eTotal Height:\u003c\/span\u003e93.2mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eInner Diameter:\u003c\/span\u003e54mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eOuter Diameter:\u003c\/span\u003e58mm\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnow to Fit:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003e\u003cspan style='font-family: \"Helvetica Neue\", Helvetica, Arial, sans-serif; font-size: 14pt;'\u003eDirt Bikes Honda CRF SSR BMS  ATVs Go Karts Fits TaoTao Roketa Coolster Apollo\u003c\/span\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092209721455,"sku":"CYLD-0125-U1","price":28.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0125_01.jpg?v=1778741799"},{"product_id":"redcap-oem-57mm-only-cylinder-head-assembly-specifically-designed-for-gy6-150cc-4-stroke-scooter-moped-157qmj-roketa-peace-jcl-chines-made-engines-aluminum-alloy-rebuild-kit","title":"RedCap OEM 57mm Only Cylinder Head Assembly, Specifically Designed for GY6 150cc 4 Stroke Scooter Moped 157QMJ Roketa Peace JCL, Chines made engines - Aluminum Alloy Rebuild Kit","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eIntroducing the\u003cspan style=\"font-weight: bold;\"\u003e RedCap OEM 57mm Cylinder Head Assembly\u003c\/span\u003e, meticulously tailored for GY6 150cc 4 Stroke Scooter Moped models, including 157QMJ Roketa Peace JCL, and other Chinese-made engines. Crafted from premium aluminum alloy, this rebuild kit make certain durable construction, providing longevity and reliability. Engineered with accuracy, it optimizes engine performance, delivering enhanced power output and efficiency. Designed for a seamless fit, installation is hassle-free, providing a accurate match with your engine. Elevate your ride with superior quality and performance.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eImproved Performance: \u003c\/span\u003eCrafted for precision, our 57mm Cylinder optimizes engine airflow and combustion dynamics, delivering heightened power output and enhanced overall performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction:\u003c\/span\u003e Constructed from premium Aluminum Alloy materials, this cylinder is built to withstand the rigors of high-performance usage, ensuring long-lasting durability and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eTailored for GY6 150cc engines, our cylinder is meticulously crafted to provide a perfect fit and effortless compatibility, streamlining the installation process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eHeat Dissipation: \u003c\/span\u003eDesigned with advanced heat dissipation mechanisms, our cylinder efficiently regulates operating temperatures, warding off overheating and maintaining consistent performance levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEngine Longevity: \u003c\/span\u003eWith exceptional defense against wear and tear, our cylinder prolongs your engine's lifespan, reducing the need for costly repairs or replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eBore Size 57mm\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eCylinder only\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eFits most 150cc GY6 Chines made engines\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote:\u003c\/span\u003e Please use our detailed pictures and measurements to make an exact match with the carb you are replacing.\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092210671727,"sku":"CYLD-0149-U1","price":27.47,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0149_01.jpg?v=1778741818"},{"product_id":"cylinder-kit-with-57mm-piston-rings-gaskets-gy6-150cc","title":"Cylinder Kit, with 57mm Piston, Rings, Gaskets  GY6 150cc","description":"\u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003eCylinder and Piston \u0026amp; Ring Kit - 150cc GY6 - 57mm -A-Block\u003c\/span\u003e\u003c\/p\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEnhanced Performance:\u003c\/span\u003e Engineered for peak performance, the 57.4mm piston within this kit is meticulously designed to provide superior compression and increased power output, a dynamic riding experience. Its precision construction make certain maximum efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCompatibility:\u003c\/span\u003e Tailored to seamlessly fit 150cc GY6 models including JCL, SunL, Roketa Scooters, ATVs, Dirt Bikes, Go Karts, and Mopeds, this design ensures compatibility with Chinese-made GY6 engine 150cc models. facilitating smooth installation and reliable performance. \u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePremium Quality: \u003c\/span\u003eConstructed from high-grade Aluminum Alloy materials, this cylinder kit provides longevity and reliability even under the most demanding conditions, providing peace of mind for your biking adventures. Its robust design make certain durable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eGasket Set:\u003c\/span\u003e Complete with a comprehensive selection of engine gaskets, this kit provides a tight seal, effectively preventing leaks and maintaining consistent performance throughout your rides. With meticulous detail, every component is included to support optimal engine function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eVersatile Application: \u003c\/span\u003eIdeal for both DIY enthusiasts and professional mechanics, this versatile kit accommodates different applications, whether for routine maintenance tasks or complete engine rebuilds. With its comprehensive components and user-friendly design, it provides the easy installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003eGaskets for Cylinder, Head, Exhaust\u003c\/li\u003e\n\u003cli\u003e57.4mm Piston\u003c\/li\u003e\n\u003cli\u003eRings\u003c\/li\u003e\n\u003cli\u003eCirq Clips\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eFits most GY6 Scooters ATVs Dirt Bikes Go Karts and Mopeds with the Chinese made GY6 engine 150cc\u003c\/li\u003e\n\u003cli\u003eFits engine with head that is 2½\" in height. Will not fit the head which is 3\" tall, as they are not interchangeable. \u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote: \u003c\/span\u003eCheck stud spacing picture to ensure you have an A-Block Engine.\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092211523695,"sku":"CYLD-0150","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0150_01.jpg?v=1778741839"},{"product_id":"big-bore-kit-69mm-valves-scooter-60cc-piston-ring-set-with-wrist-pin-and-cylinder","title":"Big Bore Kit-69mm Valves, Scooter 60cc Piston \u0026 Ring Set, with wrist pin and Cylinder","description":"Big Bore Kit-***69mm Valves***, Scooter 60cc Piston \u0026amp; Ring Set, with wrist pin and Cylinder","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092279418991,"sku":"PSTN-0095-U1","price":49.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-BBK_2445cd5a-e0d7-4fb5-9988-de76c2df7773.jpg?v=1778745626"},{"product_id":"big-bore-kit-64mm-valves-scooter-60cc-piston-ring-set-with-wrist-pin-and-cylinder","title":"Big Bore Kit-64mm Valves, Scooter 60cc Piston \u0026 Ring Set, with wrist pin and Cylinder","description":"Big Bore Kit-***64mm Valves***, Scooter 60cc Piston \u0026amp; Ring Set, with wrist pin and Cylinder","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092279844975,"sku":"PSTN-0096-U1","price":49.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-BBK_72d131d1-b971-4951-91f1-2b13f5f5587c.jpg?v=1778745642"},{"product_id":"180cc-big-bore-head-cylinder-kit-cam","title":"180cc Big Bore Head \u0026 Cylinder Kit,  Cam","description":"180cc Big Bore Head \u0026amp; Cylinder Kit,  Cam,\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eIncludes\u003c\/div\u003e\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eHead\u003c\/li\u003e\n\u003cli\u003e61mm Cylinder\u003c\/li\u003e\n\u003cli\u003eCamshaft\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003eRing Set\u003c\/li\u003e\n\u003cli\u003eWrist pin\u003c\/li\u003e\n\u003cli\u003eCirq clips\u003c\/li\u003e\n\u003cli\u003eGaskets\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092283744367,"sku":"PSTN-0122-U1","price":120.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-0122a.jpg?v=1778745691"},{"product_id":"180cc-big-bore-cylinder-kit","title":"180cc Big Bore Cylinder Kit","description":"180cc Big Bore Cylinder Kit\u003cdiv\u003e(SMALLER SLEEVE) Cylinder\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eIncludes:\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003eRing Set\u003c\/li\u003e\n\u003cli\u003eWrist pin\u003c\/li\u003e\n\u003cli\u003eCirq Clips\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092284301423,"sku":"PSTN-0123-U1","price":131.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-0122a_3ec118f1-d922-47b9-8131-47e193e40daa.jpg?v=1778745707"},{"product_id":"egr-80cc-big-bore-head-cylinder-kit-gy6-64mm","title":"EGR -80cc Big Bore Head \u0026 Cylinder Kit, GY6 64mm","description":"\u003cdiv\u003e80cc Big Bore Kit This kit fits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003cdiv\u003e\n\u003cbr\u003e\u003cdiv\u003eIncluded in this big bore set is:\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston \u0026amp; Ring Set\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirclips\u003c\/li\u003e\n\u003cli\u003eHead Gasket\u003c\/li\u003e\n\u003cli\u003eBase Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eWhile this kit works with the stock carburetor, to get the best performance you should always read you spark plug to know if larger jets would give better performance and longevity to you big bore kit.\u003c\/div\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/unitedexpressdist.3dcartstores.com\/product.asp?itemid=1773\"\u003eClick this link for the a set of jets.\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"Piston ring order\" border=\"0px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PistonRingOrder.jpg?v=1778741755\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092285022319,"sku":"HEAD-0203+CYLD-0079","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/HEAD-0203_CYLD-0079_01.jpg?v=1778745736"},{"product_id":"egr-big-bore-head-cylinder-kit-for-gy6-scooter-69mm-valves-bbk-80cc-cylinder-piston-rings-wrist-pin-circlips-head-base-gaskets-fits-with-50cc-60cc-4-stroke-gy6-qmb139-engines","title":"EGR Big Bore Head \u0026 Cylinder Kit for GY6 Scooter 69mm Valves - BBK 80cc Cylinder, Piston, Rings, Wrist Pin, Circlips, Head \u0026 Base Gaskets - Fits with 50cc, 60cc, 4-Stroke GY6\/QMB139 Engines","description":"\u003cdiv\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif;\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eRedCap EGR Big Bore Head \u0026amp; Cylinder Kit\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif;\"\u003eEGR Big Bore Head \u0026amp; Cylinder Kit - BBK 80cc GY6 Cylinder, Piston, Rings, Wrist Pin, Circlips, Head \u0026amp; Base Gaskets - Compatible with 50cc, 60cc, 4-Stroke GY6\/QMB139 Engines - GY6 Scooter 69mm Valves Head \u0026amp; Cylinder Kit - Includes Head and Base Gaskets\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif;\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eMain Features and Benefits:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; margin: 0px 0px 15px; color: rgb(51, 51, 51); overflow-wrap: break-word; font-family: arial, sans-serif;\"\u003eUpgrade your scooter or moped with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap BBK 80cc GY6 Big Bore Kit\u003c\/span\u003e, designed to enhance the performance of most Chinese scooters and mopeds with 50cc or 60cc 4-stroke GY6\/QMB139 engines. This comprehensive kit includes a cylinder, piston, ring set, wrist pin, circlips, head gasket, and base gasket, providing everything you need for a significant power boost. Compatible with the stock carburetor, this kit ensures optimal performance and longevity when larger jets are used as needed. Experience improved acceleration and top speed with this high-quality big bore kit.\u003c\/p\u003e\n\n\u003cul style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eCOMPLETE BIG BORE KIT:\u003c\/span\u003e Transform your engine with our Complete Big Bore Kit, which includes everything you need for a comprehensive upgrade: cylinder, piston \u0026amp; ring set, wrist pin, circlips, head gasket, and base gasket. Designed for seamless installation and superior performance, this all-in-one kit ensures you have all the necessary components to enhance your engine’s power and efficiency. Perfect for enthusiasts looking to boost their ride’s performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eVERSATILE DESIGN: \u003c\/span\u003eOur Complete Big Bore Kit is engineered to fit both 50cc and 60cc 4-stroke GY6\/QMB139 engines, offering significant power and performance improvements. This kit provides a versatile solution to enhance your engine's capabilities. Experience a noticeable boost in speed and efficiency with components specifically designed for a perfect fit and optimal performance. Elevate your ride with our comprehensive kit that brings versatility and power to your engine upgrade.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eOPTIMAL PERFORMANCE:\u003c\/span\u003e Our Complete Big Bore Kit is compatible with stock carburetors, ensuring easy installation and immediate performance enhancements. For the best results, read your spark plug and consider using larger jets to fully maximize performance and longevity. This approach fine-tunes your engine, providing optimal power and efficiency gains. Achieve the best possible outcome with our kit by making these small adjustments, ensuring your engine runs at peak performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eCOMPATIBILITY: \u003c\/span\u003eOur Complete Big Bore Kit is designed to work with most Chinese scooters and mopeds, making it a versatile choice for a wide range of models. Whether you own a popular brand or a lesser-known make, this kit ensures seamless integration and enhanced performance. Enjoy the convenience of a universal upgrade solution that fits various models, providing you with the power and reliability you need. Our kit is compatible with the majority of Chinese-engineered two-wheelers.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: arial, sans-serif; color: rgb(51, 51, 51);\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eGOOD QUALITY COMPONENTS: \u003c\/span\u003eOur Complete Big Bore Kit is manufactured to high standards, ensuring durability, reliability, and a longer lifespan for your scooter or moped engine. Each component is crafted with precision and care, providing you with the quality and performance you expect. Enjoy peace of mind knowing that your engine upgrade is built to last, delivering consistent power and efficiency over time. keeping your ride running smoothly and reliably.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul style=\"font-size: 16px; list-style-position: outside; list-style-image: none; margin: 15px 0px; padding: 0px 0px 0px 40px; line-height: 1.6; color: rgb(51, 51, 51); font-family: arial, sans-serif;\"\u003e\n\u003cli\u003e\n\n\u003cp style=\"margin: 0px 0px 15px; overflow-wrap: break-word;\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncluded in this big bore set are the following:\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston \u0026amp; Ring Set\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirclips\u003c\/li\u003e\n\u003cli\u003eHead Gasket\u003c\/li\u003e\n\u003cli\u003eBase Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cdiv\u003e\n\u003cdiv\u003eWhile this kit works with the stock carburetor, to get the best performance you should always read you spark plug to know if larger jets would give better performance and longevity to you big bore kit.\u003c\/div\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/unitedexpressdist.3dcartstores.com\/product.asp?itemid=1773\"\u003eClick this link for the a set of jets.\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"Piston ring order\" border=\"0px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PistonRingOrder.jpg?v=1778741755\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092285349999,"sku":"HEAD-0204+CYLD-0079","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/HEAD-0204_CYLD-0079_01.jpg?v=1778745754"},{"product_id":"egr-100cc-big-bore-head-cylinder-kit-gy6-69mm","title":"EGR -100cc Big Bore Head \u0026 Cylinder Kit, GY6 69mm","description":"100cc Big Bore Kit This kit fits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003cdiv\u003e\n\u003cbr\u003e\u003cdiv\u003eIncluded in this big bore set is:\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston \u0026amp; Ring Set\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirclips\u003c\/li\u003e\n\u003cli\u003eHead Gasket\u003c\/li\u003e\n\u003cli\u003eBase Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003eWhile this kit works with the stock carburetor, to get the best performance you should always read you spark plug to know if larger jets would give better performance and longevity to you big bore kit.\u003c\/div\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/unitedexpressdist.3dcartstores.com\/product.asp?itemid=1773\"\u003eClick this link for the a set of jets.\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"Piston ring order\" border=\"0px\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PistonRingOrder.jpg?v=1778741755\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092285743215,"sku":"HEAD-0215+CYLD-0100","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/HEAD-0204_CYLD-0079_01_42650496-fcef-4a63-91f0-28618900afc7.jpg?v=1778745770"},{"product_id":"cylinder-piston-kit-70cc-dirt-bike-for-honda-ct70","title":"Cylinder \u0026 Piston Kit, 70cc Dirt Bike for Honda CT70","description":"70cc Cylinder \u0026amp; Piston Kit with Gaskets, 70cc Dirt Bike for Honda Style\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eFits:\u003c\/div\u003e\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eHonda CT70\u003c\/li\u003e\n\u003cli\u003emost Chinese 70cc Dirt Bikes with horizontal engine.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003eKit Includes:\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003eGaskets, Head and Cylinder\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003eRings\u003c\/li\u003e\n\u003cli\u003eWrist Pin\u003c\/li\u003e\n\u003cli\u003eCirq Clips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092286103663,"sku":"PSTN-0701-U1","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-0702a.jpg?v=1778745787"},{"product_id":"cylinder-piston-kit-50cc-for-honda-xr50-crf50","title":"Cylinder \u0026 Piston Kit, 50cc for Honda XR50 CRF50","description":"Cylinder \u0026amp; Piston Kit, 50cc for Honda XR50 CRF50","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092286398575,"sku":"PSTN-0702-U1","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-0702a_ba148924-7141-4fc0-8f8e-be4ad5ce8e1d.jpg?v=1778745803"},{"product_id":"cylinder-kit-50cc-10mm-pin-2-stroke-jog-yamaha-minarelli-1e40qmb","title":"Cylinder Kit 50cc 10mm Pin 2 Stroke Jog Yamaha Minarelli 1E40QMB","description":"Cylinder Kit 50cc 10mm Pin 2 Stroke Jog Yamaha Minarelli 1E40QMB","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092286988399,"sku":"PSTN-0703-U1","price":65.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PSTN-0703_01.jpg?v=1778745821"},{"product_id":"studs-intake-and-exhaust-for-gy6","title":"Studs, Intake and Exhaust for GY6","description":"Inside Diameter: 35mm (1.37\")","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092369367151,"sku":"STUD-0100-U1","price":3.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/STUD-0100a_d1b20a91-0573-44e0-af4e-24508e471468.jpg?v=1778747411"},{"product_id":"stud-exhaust-50cc-150cc-head-for-gy6-engine-atv","title":"Stud, Exhaust,50cc-150cc Head for GY6 Engine ATV","description":"Stud, Exhaust,50cc-150cc Head for GY6 Engine ATV","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092371234927,"sku":"STUD-0110-U1","price":4.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/STUD-0110_01.jpg?v=1778747428"},{"product_id":"stud-intake-50cc-150cc-head-for-gy6-engine-long","title":"Stud, Intake, 50cc-150cc Head for GY6 Engine (Long)","description":"Stud, Intake, 50cc-150cc Head for GY6 Engine (Long)","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092372873327,"sku":"STUD-0111-U1","price":4.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/STUD-0111_01.jpg?v=1778747445"},{"product_id":"52-4mm-big-bore-complete-cylinder-assembly-kit-with-piston-rings-gaskets-compatible-with-110cc-4-stroke-chinese-engines","title":"52.4mm Big Bore Complete Cylinder Assembly Kit with Piston Rings \u0026 Gaskets Compatible with 110cc 4-Stroke Chinese Engines","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003eRevive and upgrade your 110cc engine with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 52.4mm Cylinder Rebuild Kit, \u003c\/span\u003eengineered for 4-stroke horizontal engines such as the 1P52FMH commonly found in ATVs, CT and XR dirt bikes, dune buggies, mini choppers, and go-karts. This complete top-end assembly is a game-changer for riders looking to restore lost power, improve engine efficiency, and ensure long-term durability. The kit includes a precision-machined 52.4mm cylinder, heat-resistant piston, durable piston rings, wrist pin, circlips, and a complete gasket set—each component built to meet or exceed OEM standards for fitment and performance.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003ePerfect for both DIY enthusiasts and professional mechanics, this rebuild kit is designed for seamless installation and a perfect fit on popular Chinese-made machines such as TaoTao, Kazuma, Sunl, Redcat, Roketa, and Honda CRF-style dirt bikes. The robust construction ensures reliable engine compression, reduced wear, and consistent power output—whether you're tearing up the trails, racing on the track, or cruising off-road. With this top-end rebuild kit, you can expect smooth engine starts, better throttle response, and a noticeable performance boost, giving your 110cc ride the strength and dependability it deserves.\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eThis top-end rebuild kit is precisely engineered for 110cc 4-stroke engines with a 52.4mm bore, such as the 1P52FMH commonly used in ATVs, CT, XR, dirt bikes, and mini choppers. Built to meet exact factory specifications, it guarantees seamless fitment and optimal compression performance for long-term engine reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eCompatible with a wide variety of Chinese-made dirt bikes, pit bikes, ATVs, dune buggies, and go-karts from brands like Kazuma, Tao Tao, Sunl, Roketa, Redcat, and Honda CRF. Whether you're restoring a mini-chopper or a racing quad, this 110cc rebuild kit ensures your engine runs stronger and longer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eComplete Rebuild Kit:\u003c\/span\u003e Everything you need in one box: high-quality cylinder, piston, piston rings, wrist pin, circlips, and a full set of gaskets. Whether you're replacing worn parts or performing a full top-end rebuild, this comprehensive kit saves time and ensures all components are compatible and ready for hassle-free installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eConstructed from high-grade, heat-tolerant materials, the piston and cylinder are built to withstand the rigors of off-road riding, racing, and trail use. Enhanced durability and reduced wear help your engine maintain peak performance even in high-RPM, high-temperature conditions over long periods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e Designed for straightforward installation using standard tools, this rebuild kit is ideal for both seasoned mechanics and DIY riders. With components crafted to OEM-level precision, you’ll experience an effortless upgrade that restores engine power, responsiveness, and overall performance in just a few hours.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\u003cli\u003eCylinder Top-End Rebuild Kit, 110cc, 52.4mm, 1P52FMH, Complete, 4-stroke, Honda style Horizontal\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\u003cli\u003eComplete kit with cylinder, piston, rings, gaskets, wrist pin, and circlips.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eThis fits the Chinese ATC, ATVs, CT, XR, Dirt Bikes, Dune Buggies, Karts, Mini-Choppers and Super Pocket Bikes.\u003c\/li\u003e\n\u003cli\u003eThis engine is commonly found on Dirt Bikes, Pit Bikes, ATVs and other racing or off-road vehicles made by Kazuma, Tao Tao, Sunl, Redcat, Roketa, Honda CRF and many more.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092445847663,"sku":"CYLD-0113","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0113a.jpg?v=1778749334"},{"product_id":"39mm-cylinder-kit-with-piston-rings-gasket-set-compatible-with-50cc-2-stroke-engines-for-pocket-bikes","title":"39mm Cylinder Kit with Piston Rings Gasket Set Compatible with 50cc 2-Stroke Engines for Pocket Bikes","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eEnhance your 50cc ATV or recreational vehicle with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 39mm Cylinder Kit, \u003c\/span\u003ea complete engine rebuild solution designed to deliver improved power, reliability, and performance. Tailored specifically for Chinese 50cc Honda-style engines, this kit is ideal for popular models like Kazuma, Meerkat, Redcat, as well as a wide range of mini-choppers, go-karts, and dirt bikes. With its 39mm piston and 13mm wrist pin, this kit ensures a perfect fit and increased engine efficiency. Whether you're restoring an old engine or looking to upgrade for better off-road performance, this kit offers everything needed to get your ride back on track.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eBuilt for durability and convenience, the RedCap 39mm Cylinder Kit includes a cylinder block, piston, rings, wrist pin and clips, plus all required gaskets, ensuring tight seals and optimal compression. Precision-engineered from premium-grade materials, this kit guarantees a longer lifespan even under rugged terrain conditions. Its easy installation design makes it accessible for DIY enthusiasts and professionals alike, requiring only basic tools for setup. From smoother engine starts to stronger torque and better throttle response, the RedCap kit transforms your 50cc engine into a more powerful and dependable machine for everyday fun or demanding trails.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003ePerfectly designed for 50cc Kazuma, Meerkat, Redcat ATVs, and many Chinese dirt bikes, go-karts, and mini-choppers, this RedCap 39mm Cylinder Kit ensures a precise OEM-style fit. The included 39mm piston with 13mm wrist pin is engineered for smooth compatibility, offering a reliable upgrade or replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eComplete Rebuild Kit: \u003c\/span\u003eThis comprehensive kit includes everything you need to rebuild your engine: 39mm cylinder block, piston, rings, wrist pin and clips, and premium gaskets. Eliminate the hassle of sourcing individual parts—this ready-to-install kit delivers convenience and performance in a single, value-packed package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBoost Engine Power: \u003c\/span\u003eUpgrade your ATV's performance with this precision-machined cylinder and piston combo. Experience a noticeable boost in engine power, acceleration, and combustion efficiency. Whether tearing through trails or cruising the backyard, you'll enjoy smoother rides and improved throttle response every time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eBuilt from high-quality, wear-resistant materials, the RedCap 39mm Cylinder Kit is made to handle rough terrains and high engine loads. From off-road adventures to everyday riding, it withstands extreme conditions while maintaining reliable engine compression, performance, and durability over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eEngineered with DIY users in mind, this kit offers straightforward installation with standard tools—no machining required. Whether you're a beginner or experienced mechanic, you can get your ATV, go-kart, or mini-bike back on the track or trail quickly and confidently with minimal downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eCylinder Block\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003eRings\u003c\/li\u003e\n\u003cli\u003eWrist Pin and clips\u003c\/li\u003e\n\u003cli\u003eGaskets\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePiston: \u003c\/span\u003e39mm in diameter and uses a 13mm piston pin.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eKazuma 50cc Engine. Also, a very common 50cc engine cylinder kit is used in the Chinese 50cc Honda-style engines on dirt bikes, go-karts, mini-choppers, and more.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092676206703,"sku":"CYLD-0052","price":43.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0113a_5fc253f0-f048-43a2-b19c-d84ed1354435.jpg?v=1778754652"},{"product_id":"48mm-big-bore-cylinder-kit-with-piston-rings-gasket-set-compatible-with-gy6-50cc-139qmb-4-stroke-engines","title":"48mm Big Bore Cylinder Kit with Piston Rings \u0026 Gasket Set Compatible with GY6 50cc 139QMB 4-Stroke Engines","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your ride with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 48mm Big Bore Cylinder Kit,\u003c\/span\u003e a powerful performance solution designed specifically for GY6 50cc to 60cc Chinese scooters and mopeds. Perfectly engineered to fit popular models like Tao Tao, Baja, Roketa, Kazuma, and compatible ATVs or Quads, this kit transforms your standard 50cc engine into a 60cc powerhouse. The kit includes a 44mm cylinder, 43mm piston with rings, gaskets, valve oil seals, and pin clips, ensuring a complete and hassle-free upgrade experience. Whether you're looking for stronger acceleration, improved top-end speed, or better torque on challenging terrain, this RedCap kit offers the performance boost you need without sacrificing reliability.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eCrafted from high-grade materials and tested for quality and durability, this kit ensures smooth operation under demanding conditions. The precision-fit piston rings provide a tight seal, reducing friction and boosting combustion efficiency for consistent power delivery. With easy installation and seamless compatibility for most 139QMB GY6 engines, this kit is ideal for DIY upgrades or professional performance tuning. Enjoy a significant performance lift and extend the life of your engine with this rugged and reliable big-bore upgrade from RedCap—perfect for daily commuters, performance enthusiasts, and weekend riders alike.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncluded Package:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eCylinder Kit\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003ePiston Ring \u0026amp; pin clip\u003c\/li\u003e\n\u003cli\u003eGaskets\u003c\/li\u003e\n\u003cli\u003eValve Oil Seal\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eFit in GY6 50cc to 60cc Cylinder kit for Chinese ATV Quad Parts, TAOTAO, BAJA, Roketa, Kazuma\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092685283439,"sku":"CYLD-0060","price":38.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0060_01.jpg?v=1778754835"},{"product_id":"gy6-50cc-cylinder-head-studs-176mm-and-168mm-set-of-4-pieces","title":"GY6 50cc Cylinder Head Studs 176mm and 168mm set of 4 pieces","description":"\u003cp\u003eGY6 50cc Cylinder Head Studs 76mm and 168mm set of 4 pieces\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eOverall Length: 176mm and 168mm\u003cbr\u003eThread Size: M7x1.00\u003cbr\u003eThread Lengths: 18mm \u0026amp; 14mm\u003c\/p\u003e\u003cstrong\u003eIncludes:\u003c\/strong\u003e\u003cbr\u003e2 studs at 176mm (overall length)\u003cdiv\u003e2 studs at 168mm (overall length)\u003c\/div\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSupported Models:\u003c\/strong\u003e\u003cbr\u003eQMB139 50cc\/49cc , Various unlisted makes\/models\u003c\/p\u003e\n\u003cli\u003eSize: 2 x M7 x 168mm, 2 x M7 x 176mm\u003c\/li\u003e \u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092772970607,"sku":"PUM-50-0212","price":12.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PUM-50-0212_01_2927b1c9-83ce-4714-a2ae-029c3ebf7945.jpg?v=1778756807"},{"product_id":"cylinder-jug-for-250cc-4-stroke-water-cooled-v3-v5-engines-found-on-street-legal-scooters-atvs-dune-buggies-and-much-more","title":"Cylinder Jug for 250cc 4-stroke water-cooled V3\/V5 engines found on street-legal scooters, ATVs, Dune Buggies and much more.","description":"\u003cp\u003eCylinder body for 250cc 4-stroke water-cooled V3\/V5 engines found on street-legal scooters, ATVs, Dune Buggies and much more. Cylinder Bore: 72mm\u003c\/p\u003e\n","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53092913021039,"sku":"PUM-BN172MM0300001","price":43.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/PUM-BN172MM0300001-1.jpg?v=1778760185"},{"product_id":"cylinder-110cc-1p52fmh-engines-atv-dirt-bike","title":"Cylinder 110cc 1P52FMH Engines ATV Dirt Bike","description":"CYLINDER JUG TOP END KIT 1P52FMH  for CHINESE 110CC ROKETA TAOTAO SSR ATV DIRT BIKE \u003cbr\u003e \u003cbr\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your ATV or dirt bike's engine performance with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 52.4mm Cylinder Head Assembly Kit\u003c\/span\u003e, designed specifically for 4-stroke horizontal 110cc 1P52FMH engines. Whether you're restoring an older vehicle or boosting your current ride, this complete top-end rebuild kit is built for reliability and performance. It includes a high-quality cylinder with a precise 52.4mm bore, piston, pin, gaskets, and all necessary components to ensure a seamless installation. Engineered to OEM specifications, this kit delivers powerful and efficient combustion, helping you get back on the trail with renewed confidence.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eBuilt to endure rugged terrain and extended use, the RedCap cylinder kit is compatible with a wide range of Chinese 110cc ATVs, dirt bikes, and go-karts, including models from Roketa, Taotao, Kazuma, Sunl, SSR, Coolster, JCL, Peace, Baja, and more. The kit’s cylinder features a 69mm middle height, 91mm total height, and 56.4mm skirt diameter. Whether you're racing or off-roading, this durable, precision-engineered kit restores lost compression and performance, delivering a smooth, powerful ride every time.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eFits a wide range of 110cc vehicles, including Roketa, Taotao, Kazuma, Sunl, SSR, Coolster, JCL, Peace, Hensim, Baja, and other Chinese ATVs, dirt bikes, and scooters. A dependable replacement part for any rider seeking performance and reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eUpgrade for 110cc Engines: \u003c\/span\u003eUpgrade or replace your worn-out 110cc engine component with this RedCap 52.4mm cylinder head assembly. Specifically designed for horizontal 4-stroke 1P52FMH engines commonly found in ATVs, dirt bikes, and go-karts, it ensures optimal performance and fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePrecision Engineered:\u003c\/span\u003e This 52.4mm cylinder head features precise machining for smooth airflow and combustion. With a middle height of 69mm and total height of 91mm, it guarantees tight compatibility with your 110cc 1P52FMH engine block, helping restore factory-grade performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Build: \u003c\/span\u003eCrafted from high-strength, heat-resistant alloy materials, this cylinder head is built to handle high RPMs and extreme riding conditions. Whether you're racing or trail riding, count on long-term durability and stable compression performance under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e Designed for DIYers and mechanics alike, this kit offers straightforward installation and immediate performance improvements. Get better compression, power, and throttle response with this reliable solution tailored to 4-stroke horizontal 110cc engines.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e110CC ATV Cylinder Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eMiddle Height:\u003c\/span\u003e 69mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eTotal Height:\u003c\/span\u003e 91mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eInner Diameter:\u003c\/span\u003e 52.4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eOuter Skirt Diameter: \u003c\/span\u003e56.4mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eCompatibility:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eRoketa 110cc ATV Dirt Bike Go Kart\u003c\/li\u003e\n\u003cli\u003eKazuma 110cc ATV Dirt Bike Go Kart\u003c\/li\u003e\n\u003cli\u003eSunl 110cc ATV Dirt Bike Go Kart\u003c\/li\u003e\n\u003cli\u003eTaotao 110cc ATV Dirt Bike Go Kart\u003c\/li\u003e\n\u003cli\u003eJeMoto, Hensim, JCL, Coolster, Baja, Peace, SSR 110cc and more.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093205672047,"sku":"CYLD-0111","price":32.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0110a.jpg?v=1778766880"},{"product_id":"motorcycle-61mm-big-bore-head-cylinder-with-piston-rings-for-gy6-170cc-200cc-bikes-engine-motor","title":"Motorcycle 61mm Big Bore Head Cylinder with Piston Rings for GY6 170cc - 200cc Bikes Engine Motor","description":"\u003cp\u003e\u003cstrong\u003e61mm Motorcycle Big Bore Cylinder Piston Gasket Rebuild Kit For GY6 150cc 169cc\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFor K-Block Engine with 57mm stud spacing\u003c\/strong\u003e\u003c\/p\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eElevate your motorcycle's power with our\u003cspan style=\"font-weight: bold;\"\u003e RedCap 61mm Big Bore Cylinder Head Piston Gasket Rebuild Kit\u003c\/span\u003e, tailor-made for GY6 engines ranging from 170cc to 200cc displacement. Crafted from durable aluminum alloy, this kit make certain longevity and performance excellence. Engineered with accuracy for engines featuring a 57mm bolt spacing, such as the K Block Engines with Engine Code LF161QMK, this rebuild kit provide a seamless fit and optimal functionality. Unleash newfound horsepower and torque, transforming your ride into a powerhouse on the road.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEnhanced Power: \u003c\/span\u003eWith the 61mm big bore cylinder head, your GY6 engine will reach its maximum potential. This modification makes it possible for more gasoline and air to circulate, which increases horsepower and torque and makes for an exciting ride.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eFitment: \u003c\/span\u003eIdeal for GY6 engines with a 200cc displacement and a 57mm bore, this kit is compatible with various scooters, ATVs, and other recreational vehicles. Whether you're a casual rider or a motorsports enthusiast, this kit is designed to meet your performance needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eComplete Rebuild Kit: \u003c\/span\u003eThis comprehensive kit includes all the essential components for a hassle-free rebuild – from the piston and cylinder head to the gaskets and seals. Simplify the upgrade process and get everything you need in one package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Materials: \u003c\/span\u003eThe parts in this kit are made to last and are made of premium aluminum alloy materials that can handle the demands of heavy use. Longevity and dependability are provided by the precise engineering of the cylinder head, gaskets, and piston.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePrecision Design: \u003c\/span\u003eThe 61mm bore maximises power production by ensuring maximum combustion efficiency. Every part is painstakingly made to precise measurements, providing a perfect fit and improving overall engine performance overall.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003ePiston Bore Diameter: 61mm\u003c\/li\u003e\n\u003cli\u003eStud Spacing: 57mm\u003c\/li\u003e\n\u003cli\u003ePin OD: 15mm  \u0026amp; Length: 48.5mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e1 - Cylinder\u003c\/li\u003e\n\u003cli\u003e1 - Piston \u0026amp; Rings\u003c\/li\u003e\n\u003cli\u003e3 - Gaskets (Head, Cylinder, Timing Adjustment Opening)\u003c\/li\u003e\n\u003cli\u003e2 - Cirq Clips\u003c\/li\u003e\n\u003cli\u003e1 - Wrist Pin\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eEngine LF161QMK\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote: \u003c\/span\u003ePlease check pictures for more details, and check your part number and our fitment before placing an order.\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093341167727,"sku":"CYLD-0171-SET","price":69.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0171-SET_01.jpg?v=1778769747"},{"product_id":"cylinder-piston-rings-wrist-pin-cirq-clips-kit-for-170cc-gy6","title":"Cylinder, Piston \u0026 Rings, Wrist pin, Cirq Clips Kit for 170cc GY6","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003eUpgrade your GY6 170cc engine to a powerful 200cc setup with the \u003cspan style=\"font-weight: bold;\"\u003e61mm Big Bore Cylinder Head and Piston Rings Kit,\u003c\/span\u003e engineered for riders who demand more from their machines. Featuring a 61mm piston bore diameter and 57mm stud spacing, this high-performance kit ensures a precise fit and effortless installation for GY6 engines—especially the LF161QMK engine. Constructed from durable aluminum alloy, the cylinder body offers superior heat dissipation, reduced friction, and minimized leakage, resulting in smoother engine performance and extended longevity.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis complete engine rebuild kit includes everything you need to revitalize your ride: a cylinder, piston with rings, and three gaskets (head, cylinder, and timing adjustment opening). Whether you're upgrading for power, replacing worn parts, or boosting efficiency, this kit delivers exceptional value and convenience. Designed for motorcycle enthusiasts, it provides an easy, reliable solution to unlock enhanced torque, acceleration, and engine reliability. Perfect for GY6 170cc to 200cc dirt bikes, scooters, and ATVs, the Big Bore Kit ensures your ride is ready to perform at its best.\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eEngineered with a 61mm piston bore diameter and 57mm stud spacing, this Big Bore Kit ensures a precise OEM-like fit for GY6 170cc engines upgraded to 200cc engines. It's an ideal replacement for worn-out or damaged components, delivering flawless compatibility with Engine LF161QMK for optimal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility:\u003c\/span\u003e Designed to work seamlessly with a wide range of GY6 4-stroke 170cc to 200cc engines, this kit is compatible with popular brands like TaoTao, Roketa, Jonway, Sunl, and other Chinese scooters, ATVs, and dirt bikes. It's the perfect choice for engine rebuilds or performance upgrades across multiple models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEngine Performance: \u003c\/span\u003eEnhance torque, horsepower, and fuel combustion with this high-performance 61mm Big Bore Kit. Designed to convert your GY6 170cc engine to 200cc, it gives you more throttle response and riding power, perfect for enthusiasts who demand more speed and reliability from their engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eCrafted from high-grade aluminum alloy, the cylinder and piston deliver exceptional strength, thermal efficiency, and wear resistance. This rugged construction reduces engine friction and leakage, allowing for extended engine life and reliable high-performance under extreme conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eThe kit includes all necessary components Cylinder, piston, rings, and 3 precision gaskets—making installation fast and hassle-free. Whether you're a DIY enthusiast or a professional mechanic, this plug-and-play rebuild kit simplifies the process and restores engine function in no time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eDetails:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePiston Bore Diameter: \u003c\/span\u003e61mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eStud Spacing: \u003c\/span\u003e57mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePin OD:\u003c\/span\u003e 15mm \u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003ePackage Includes:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e1 - Cylinder\u003c\/li\u003e\n\u003cli\u003e1 - Piston \u0026amp; Rings\u003c\/li\u003e\n\u003cli\u003e3 - Gaskets (Head, Cylinder, Timing Adjustment Opening)\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\u003cli\u003eEngine LF161QMK\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote:\u003c\/span\u003e Please check pictures for more details, and check your part number and our fitment before placing an order.\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093408178287,"sku":"CYLD-0171","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0171_01.jpg?v=1778770783"},{"product_id":"cylinder-piston-rings-wrist-pin-clips-gaskets-kit-for-jonway-gtx-250-efi-manual-6-speed-motorcycle","title":"Cylinder, Piston, Rings, Wrist Pin, Clips, Gaskets Kit for Jonway GTX 250 EFI - Manual 6 Speed Motorcycle","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your motorcycle’s performance with the\u003cspan style=\"font-weight: bold;\"\u003e RedCap Cylinder, Piston, Rings, Wrist Pin, Clips, and Gaskets Kit, \u003c\/span\u003ea premium solution specifically designed for the Jonway GTX 250 EFI manual 6-speed. Whether you're restoring engine performance or preparing for a full rebuild, this all-in-one kit offers everything you need to bring your bike back to life. Engineered with precision, each component — from the 65.5mm piston to the 69.5mm cylinder sleeve — is built to withstand high-performance demands and deliver long-term durability. It’s an ideal choice for riders who expect reliability and peak performance on every journey.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eThis comprehensive kit includes a high-quality cylinder, matching piston, durable rings, wrist pin, circlips, and gaskets, ensuring seamless installation and superior engine sealing. Designed for a perfect fit with the Jonway GTX 250 EFI, this kit enhances compression, improves power output, and ensures smoother throttle response. Whether you're a DIY enthusiast or a seasoned mechanic, this maintenance-ready set will streamline your engine rebuild process, giving your bike renewed strength and efficiency for the road ahead.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePiston Bore Diameter: \u003c\/span\u003e65.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCylinder Sleeve OD:\u003c\/span\u003e 69.5\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncluded:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003eCylinder\u003c\/li\u003e\n\u003cli\u003ePiston\u003c\/li\u003e\n\u003cli\u003eRigns\u003c\/li\u003e\n\u003cli\u003eWrist pin\u003c\/li\u003e\n\u003cli\u003eClip\u003c\/li\u003e\n\u003cli\u003eGasket\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote: \u003c\/span\u003ePlease check pictures for more details, and check your part number and our fitment before placing an order.\u003c\/div\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093522899055,"sku":"CYLD-0191","price":78.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0191_01.jpg?v=1778772571"},{"product_id":"47mm-big-bore-cylinder-kit-with-piston-rings-gaskets-for-139qmb-qmb139-qmi139-4-stroke-gy6-50cc-scooters-80cc-100cc","title":"47mm Big Bore Cylinder Kit with Piston Rings Gaskets for 139QMB QMB139 QMI139 4-Stroke GY6 50cc Scooters 80cc 100cc","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade your scooter's engine power and efficiency with the \u003cspan style=\"font-weight: bold;\"\u003eRedCap 47mm Big Bore Cylinder Head and Piston Rings Rebuild Kit,\u003c\/span\u003e specifically engineered for GY6\/QMB139 4-stroke engines. Designed to replace or enhance your existing 50cc or 60cc setup, this kit increases your engine displacement to approximately 80cc, delivering noticeable improvements in acceleration, throttle response, and fuel combustion. The kit includes a precision-machined aluminum alloy cylinder block, piston, complete ring set, wrist pin, circlips, and a comprehensive gasket set for a smooth and hassle-free installation. Whether you're rebuilding a worn-out engine or upgrading for extra power, this high-quality kit ensures long-term performance and reliability.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eThis big-bore kit is compatible with a wide variety of Chinese scooters, mopeds, ATVs, and go-karts, including popular brands like TaoTao, Roketa, Sunl, SYM, PGO, KYMCO, Vento, Jonway, Strada, Kazuma, and many others using the GY6 50cc-80cc engine platform (139QMB\/QMI). Designed to meet or exceed OEM specifications, this kit integrates easily with stock carburetors and engine components, offering a plug-and-play upgrade for most users. For optimal performance, it's recommended to tune your carburetor with larger jets and monitor the spark plug during initial runs. Whether you're commuting or off-roading, this kit boosts your scooter’s power and performance without compromising fuel efficiency or engine longevity.\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eEngineered with precision to ensure a snug and secure fit for GY6\/QMB139 engines. The 47mm cylinder provides increased power without compromising structural integrity, delivering smoother operation, better acceleration, and improved combustion. A reliable upgrade for restoring or boosting your engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eDesigned for a wide range of Chinese scooters, mopeds, ATVs, and go-karts, the RedCap Big Bore Kit fits most 4-stroke GY6 or 139QMB engine models from 50cc to 80cc. Compatible with brands like YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, STRADA, ROKETA, and more, ensuring versatility for countless vehicle types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEngine Upgrade:\u003c\/span\u003e Boost your scooter or moped's power and efficiency with the RedCap 47mm Big Bore Kit. Designed for 50cc to 80cc 4-stroke GY6\/QMB139 engines, this kit increases engine displacement, delivering better throttle response, smoother operation, and more horsepower for everyday riding or performance upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eCrafted from premium-grade aluminum alloy, this rebuild kit offers exceptional durability, heat resistance, and wear tolerance. Each component is precision-machined to meet or exceed OEM standards, providing long-lasting reliability and enhanced engine life, even in demanding riding conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eCylinder block, piston, ring set, circlips, piston pin, and gaskets. The user-friendly design ensures a smooth installation process, whether you're a DIY mechanic or a professional. Works seamlessly with stock carburetors for instant performance gains.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCylinder Bore Size:\u003c\/span\u003e 47mm\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\n\u003cli\u003e1x Cylinder Block.\u003c\/li\u003e\n\u003cli\u003e1x Piston.\u003c\/li\u003e\n\u003cli\u003e1x Complete Ring Set.\u003c\/li\u003e\n\u003cli\u003e2x Cirq clips.\u003c\/li\u003e\n\u003cli\u003e1x Piston Pin.\u003c\/li\u003e\n\u003cli\u003e2x Head Gasket Set.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit:\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cul\u003e\u003cli\u003eFits many models such as YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, STRADA, ROKETA, FUJI, WILDFIRE, KAZUMA 80cc Big Bore Kit. This kit fits most Chinese Scooters\/Mopeds with 50cc, 60cc 4-Stroke GY6\/QMB139 engines.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093622022255,"sku":"CYLD-0079","price":39.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0079_01.jpg?v=1778775106"},{"product_id":"bbk-bottom-end-only-61mm-gy6-180cc-piston-ring-set-with-wrist-pin-and-cylinder","title":"BBK Bottom End ONLY- 61mm GY6 180cc Piston \u0026 Ring Set, with wrist pin and Cylinder","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003eUpgrade your scooter, ATV, or moped with th\u003cspan style=\"font-weight: bold;\"\u003ee RedCap 61mm Big Bore Cylinder Piston Kit, \u003c\/span\u003eengineered to deliver serious performance gains for GY6 125cc and 150cc engines. Whether you're restoring lost power or chasing higher torque and speed, this 180cc BBK bottom-end kit is built to take your ride to the next level. Precision-crafted from high-quality, heat-resistant materials, it features a 61mm piston and cylinder with a 54mm stud spacing and 64mm outer sleeve diameter—ensuring optimal fitment, heat dissipation, and long-term durability under high RPMs and heavy loads. With improved compression and enhanced combustion efficiency, this upgrade gives you smoother throttle response, better acceleration, and overall enhanced ride quality.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis all-in-one RedCap piston \u0026amp; ring set includes a 61mm piston, matching cylinder, wrist pin, circlips, and both head and base gaskets—everything you need for a hassle-free bottom-end engine rebuild or upgrade. Perfect for a wide range of Chinese-made GY6 4-stroke engines found in scooters, mopeds, and ATVs from brands like TaoTao, Roketa, Coolster, and more, it’s designed for easy installation and dependable performance. Just make sure to verify your engine’s cylinder fin configuration and measurements to ensure compatibility. With RedCap's trusted engineering, this kit offers a reliable and affordable path to better power, cooler operation, and longer engine life.\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eEngineered with precision to match most GY6 125cc and 150cc 4-stroke engines, this RedCap 61mm Big Bore Kit features a 54mm stud spacing and 61mm inner sleeve diameter. It ensures a snug, secure fit for reliable compression and optimal combustion, giving your engine the power boost it needs without hassle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eDesigned for a wide range of Chinese scooters, ATVs, go-karts, and mopeds, this kit fits engines found in TaoTao, Roketa, Coolster, Apollo, Sunl, Lifan, and more. With universal 54mm stud spacing and GY6 platform alignment, it offers versatile compatibility—perfect for both casual riders and professional tuners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEngine Rebuild Kit: \u003c\/span\u003eThis RedCap 180cc Big Bore Kit is your complete bottom-end rebuild solution, perfect for restoring lost power or achieving higher torque and speed. With accurate specs (54mm stud spacing, 61mm ID, 64mm OD), it's an ideal upgrade for GY6 125cc\/150cc scooters and ATVs aiming for smoother, more powerful performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eCrafted from premium heat-resistant materials, the RedCap piston \u0026amp; cylinder kit offers long-lasting durability even under extreme riding conditions. The robust cylinder sleeve and finely machined piston are built to withstand high RPMs and thermal stress, ensuring consistent engine performance and longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e Whether you're a seasoned mechanic or a confident DIYer, this bottom-end upgrade kit is designed for easy installation with no special tools required. The all-in-one package includes the 61mm piston, cylinder, wrist pin, circlips, and gaskets, everything needed to rebuild or upgrade your GY6 engine quickly and efficiently.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eSpecs:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eStud Spacing:\u003c\/span\u003e 54mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCylinder Sleeve ID: \u003c\/span\u003e61 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCylinder Sleeve OD: \u003c\/span\u003e64 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\u003cli\u003eCylinder, 61 mm piston, clips, piston pin, head gasket, and base gasket\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093622513775,"sku":"CYLD-0180","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld-0180_01.jpg?v=1778775126"},{"product_id":"62mm-cylinder-piston-gasket-rebuild-kit-for-4-stroke-engine-b-block","title":"62mm Cylinder Piston Gasket Rebuild Kit for 4-Stroke Engine B-Block","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\n\u003cdiv\u003eUpgrade your off-road experience with the\u003cspan style=\"font-weight: bold;\"\u003e 62mm Cylinder Piston Gasket Rebuild Kit, \u003c\/span\u003ea comprehensive top-end solution built for performance, precision, and reliability. Designed specifically for Chinese GY6 4-stroke engines, including the Apollo Commander 200, RFZ, and Batman 200M, this kit is engineered with a 62mm piston bore and 57mm stud spacing to perfectly fit 1P62QML valve cover engines. Whether you're replacing worn-out components or enhancing your ATV or Go-Kart’s power output, this high-performance rebuild kit offers a dependable solution to keep your engine running smoothly.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eConstructed from premium-grade aluminum alloy for superior heat dissipation and long-term durability, the rebuild kit includes a cylinder, piston, piston rings, circlips, wrist pin, and three essential gaskets. This ensures complete combustion efficiency, improved torque, and optimal engine performance on any terrain. Compatible with a wide range of 200cc and 170cc Apollo ATVs and Go-Karts, this kit is ideal for enthusiasts and mechanics alike looking for a direct-fit upgrade. From rugged trails to competitive tracks, count on this rebuild kit to deliver power, performance, and peace of mind.\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003ePerfect Fit: \u003c\/span\u003eEngineered with precision, the Apollo 200cc GY6B Rebuild Kit features a 62mm piston bore diameter and 57mm stud spacing, ensuring a perfect top-end fit for your 1P62QML GY6 engine. Whether you're replacing worn components or rebuilding from scratch, expect a snug, leak-free seal and optimal combustion performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility:\u003c\/span\u003e This complete rebuild kit is compatible with a wide range of Chinese-made 4-stroke engines found in Apollo Commander 200, RFZ, Batman 200M ATVs, and Go-Karts. Designed for 200cc GY6B engines, it also fits select 170cc engines, making it an ideal choice for various off-road applications using the 1P62QML engine block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eComplete Kit: \u003c\/span\u003eIncludes everything you need for a thorough top-end rebuild—1 cylinder, 1 piston \u0026amp; rings, 3 gaskets (head, cylinder, timing), 2 circlips, and 1 wrist pin (15mm x 48.5mm). With all critical parts in one package, this kit restores compression, power, and efficiency to your GY6 engine in a single go.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eCrafted from high-strength aluminum alloy, this kit delivers excellent durability and heat dissipation under intense riding conditions. It’s built to endure high temperatures and engine pressure, reducing wear and extending engine life. Ideal for off-road adventurers and performance enthusiasts alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eDesigned for DIYers and mechanics, this kit includes all essential components: cylinder, piston, rings, 3 gaskets, wrist pin, and circlips. The direct-fit design with 57mm stud spacing simplifies installation—no machining required. Get back on the trail or track with minimal downtime and maximum reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003e1 - Cylinder\u003c\/li\u003e\n\u003cli\u003e1 - Piston \u0026amp; Rings\u003c\/li\u003e\n\u003cli\u003e3 - Gaskets (Head, Cylinder, Timing Adjustment Opening)\u003c\/li\u003e\n\u003cli\u003e2 - Cirq Clips\u003c\/li\u003e\n\u003cli\u003e1 - Wrist Pin\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan style=\"font-weight: bold;\"\u003eKnown to Fit: \u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cul\u003e\n\u003cli\u003eApollo GY6 200 ATVs and Go Karts\u003c\/li\u003e\n\u003cli\u003eB-Block\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eNote:\u003c\/span\u003e Please check the pictures for more details, as well as your part number and our fitment, before placing an order.\u003c\/div\u003e\n\u003c\/div\u003e\u003cstrong\u003e\u003c\/strong\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093641289839,"sku":"CYLD-0301","price":56.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0301_01.jpg?v=1778775689"},{"product_id":"cylinder-90cc-47mm-premium-performance-cylinder-head-for-atv-engines","title":"Cylinder 90cc 47mm Premium Performance Cylinder Head for Atv Engines","description":"\u003cspan style=\"font-weight: bold;\"\u003eRedCap Cylinder, ATV 90cc 47mm\u003c\/span\u003e\u003cp\u003ePremium Performance Cylinder Head for ATV Engines - Durable Motorcycle and Dirt Bike Parts - GY6 Performance Parts and Accessories\u003c\/p\u003e\u003cspan style=\"font-weight: bold;\"\u003eMain Features and Benefits:\u003c\/span\u003e\u003cp\u003eUpgrade your ATV's performance with the RedCap Cylinder for 90cc engines. Designed with precision, this cylinder head features a 47mm inside diameter, ensuring optimal power and efficiency. Whether you're looking to enhance your ATV, dirt bike, or motorcycle, our high-quality cylinder piston kit provides the perfect solution. Made from durable materials, it withstands high pressures and temperatures, ensuring longevity and reliable performance. Ideal for enthusiasts seeking GY6 performance parts or those needing a reliable engine cylinder head, the RedCap Cylinder is your go-to choice for superior performance. Install with confidence and experience the difference in power and reliability. Perfect for off-road adventures and daily use, this cylinder kit is a must-have for any serious rider.\u003c\/p\u003e\u003cspan style=\"font-weight: bold;\"\u003eKey Features:\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eCylinder Head:\u003c\/span\u003e Enhance your ATV's engine with the RedCap Cylinder designed for 90cc engines with a 47mm inside diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction:\u003c\/span\u003e Made from high-quality materials, our cylinder head ensures longevity and withstands high pressures and temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eVersatile Application:\u003c\/span\u003e Ideal for ATVs, dirt bikes, and motorcycles, making it a perfect addition to your GY6 performance parts collection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eReliable Performance:\u003c\/span\u003e Experience improved power and efficiency with our precision-engineered cylinder piston kit, which is suitable for off-road adventures and daily use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation:\u003c\/span\u003e Designed for a hassle-free installation process, allowing you to upgrade your vehicle's engine quickly and effectively.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093651710063,"sku":"CYLD-0090","price":22.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/41ZRlpxpIkL.jpg?v=1778775759"},{"product_id":"cylinder-piston-kit-for-50cc-gy6-4-stroke","title":"Cylinder Piston Kit for 50cc GY6 4-Stroke","description":"\u003cdiv style=\"\"\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eRestore your scooter or moped's power and performance with the \u003cspan style=\"font-weight: bold;\"\u003e39mm Cylinder Kit,\u003c\/span\u003e engineered for 49cc and 50cc GY6 4-stroke engines using the 139QMB platform. Whether you're dealing with compression loss, engine wear, or just need a reliable upgrade, this complete top-end rebuild kit includes a precisely machined cylinder, high-quality piston, piston rings, and head gasket—everything needed to bring your ride back to life. Perfectly suited for scooters, mopeds, and ATVs from well-known Chinese brands such as TaoTao, Jonway, Roketa, Baja, Peace, SunL, and more.\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"\"\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"\"\u003e\n\u003cdiv style=\"\"\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif; font-weight: bold;'\u003eSpecifications:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"\"\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eCylinder Bore:\u003c\/span\u003e 39mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003e\u003cspan style=\"font-weight: bold;\"\u003eMaterial: \u003c\/span\u003eAluminum Alloy\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003cdiv style=\"\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eIncludes:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"\"\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eCylinder\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003ePiston\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003ePiston Rings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eWrist Pin\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eCirclips\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eHead Gasket\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093653151855,"sku":"CYLD-0050","price":27.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/cyld_0050_01.jpg?v=1778775808"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/collections\/bigborekit_thumbnail.jpg?v=1778168723","url":"https:\/\/uedist.com\/collections\/cylinder-kits.oembed?page=4","provider":"United Express Distribution","version":"1.0","type":"link"}