50mm Big Bore Cylinder with Gasket for GY6 139QMB 4-Stroke Engines Fits 50cc to 80cc Scooters Mopeds

Upgrade the engine of your ride with the 80cc Big Bore Cylinder Kit, engineered 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.

Crafted 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.