{"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","url":"https:\/\/uedist.com\/products\/100cc-big-bore-head-cylinder-kit-gy6-cylinder-piston-rings-for-4-stroke-gy6-qmb139-engines","provider":"United Express Distribution","version":"1.0","type":"link"}