GY6 Scooter 125cc to 150cc Big Bore Cylinder Barrel & Piston Kit – Complete Top End Upgrade

Upgrade your 125cc engine with this high-performance 150cc Big Bore Cylinder Barrel & Piston Kit, designed to deliver increased power, smoother acceleration, and enhanced durability. Perfect for riders looking to boost their bike’s performance without compromising reliability.

This complete top-end rebuild kit includes everything you need for a seamless installation:

• Cylinder Barrel – Precision-machined for optimal compression and heat dissipation
• Piston Kit – Includes piston, piston pin, circlips (x2), and piston ring set for a secure fit and smooth operation
• Gaskets – Head gasket, base gasket, and cam chain tensioner gasket to ensure a leak-free seal and long-lasting performance

Whether you’re rebuilding your engine or upgrading for more torque and speed, this kit is compatible with most 125cc GY6 Scooter based engines being converted to 150cc. Ideal for Scooters, pit bikes, ATV , Quads and Buggies

To fit the following models: