{"product_id":"50mm-big-bore-cylinder-with-gasket-for-gy6-139qmb-4-stroke-engines-fits-50cc-to-80cc-scooters-mopeds","title":"50mm Big Bore Cylinder with Gasket for GY6 139QMB 4-Stroke Engines Fits 50cc to 80cc Scooters Mopeds","description":"\u003cdiv style='font-family: \"Market Sans\", Arial, sans-serif;'\u003eUpgrade the engine of your ride with the \u003cspan style=\"font-weight: bold;\"\u003e80cc Big Bore Cylinder Kit, \u003c\/span\u003eengineered for GY6 50cc engine platforms commonly found in scooters, mopeds, and ATVs. This high-performance upgrade is precision-machined to deliver increased displacement, significantly enhancing horsepower, torque, and overall engine responsiveness. Whether you're looking to boost acceleration, climb steeper inclines, or simply cruise at higher top speeds, this cylinder upgrade ensures your engine performs beyond standard limits. Ideal for both everyday commuting and adventurous off-road riding, it brings race-inspired performance to your daily ride.\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 durable, heat-resistant materials, the cylinder is built to endure high-RPM conditions and extended use. Designed specifically for the 139QMB (GY6 50cc) engine architecture, this 80cc upgrade is compatible with popular Chinese-made brands and models, including TaoTao, Jonway, Roketa, Peace, Baotian, Znen, and more. With a bore size of approximately 47mm–50mm (varies by kit variation), this cylinder offers improved combustion efficiency and fuel utilization. The package typically includes the cylinder block only (no piston or gaskets), making it ideal for customers who already have other top-end components or are customizing their build. Ensure proper clearance and installation by verifying your engine type before ordering.\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\u003e This precision-machined cylinder offers a seamless fit for GY6 50cc-80cc engines, making it an ideal upgrade for Chinese scooters, go-karts, and ATVs. Compatible with models like YERFDOG, SYM, KYMCO, ROKETA, VENTO, and SUNL, it ensures easy integration into a wide range of motorized vehicles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eWide Compatibility: \u003c\/span\u003eWhether you're working with a scooter, go-kart, ATV, or mini dune buggy, this 80cc cylinder is made for you. It fits most Chinese 4-stroke 139QMB engines and is compatible with popular brands like WILDFIRE, STRADA, FUJI, and KAZUMA, making it a versatile option for engine upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eHigh Performance:\u003c\/span\u003e Experience a noticeable power increase with the 80cc Big Bore Cylinder. Designed for 4-stroke GY6 139QMB engines, the 47mm (53.2mm) bore transforms your standard 50cc into a performance-driven 80cc engine. Perfect for riders seeking enhanced speed, torque, and fuel efficiency without a full engine swap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eDurable Construction: \u003c\/span\u003eBuilt from durable, heat-resistant aluminum alloy, this BBK cylinder is engineered to withstand high RPMs and tough riding conditions. The robust construction helps reduce engine wear, supports longer engine life, and ensures smoother, more reliable performance under pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eEasy Installation: \u003c\/span\u003eDesigned for convenience, the Cylinder is ideal for both mechanics and DIY riders. With basic tools and mechanical knowledge, you can install this BBK cylinder with ease. Its plug-and-play nature allows for fast upgrades, letting you hit the road or trail with more power in no time.\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;\"\u003eEngine Compatibility: \u003c\/span\u003eGY6 139QMB \/ QMB139 4-stroke engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eBore Diameter: \u003c\/span\u003e50mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eMaterial: \u003c\/span\u003eAluminum alloy with cast iron liner\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\u003eTaoTao (ATM50-A1, CY50-A), Jonway, Roketa (MC-08, MC-17), Peace Sports, Baotian, Znen, Baccio, Tank Urban 50, Kymco Agility 50 (Chinese clone), Wildfire, Kazuma, SUNL, and other GY6 50cc-based models.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/div\u003e ","brand":"United Express Distribution","offers":[{"title":"Default Title","offer_id":53093653250159,"sku":"CYLD-0078","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0368\/1391\/files\/CYLD-0078_01_948ba16d-1421-44dd-9a79-0f8f3572d8ec.jpg?v=1778775826","url":"https:\/\/uedist.com\/products\/50mm-big-bore-cylinder-with-gasket-for-gy6-139qmb-4-stroke-engines-fits-50cc-to-80cc-scooters-mopeds","provider":"United Express Distribution","version":"1.0","type":"link"}