WOSSNER offers you a high-performance 2-stroke STD piston kit designed for optimum precision fit and maximum combustion efficiency. Manufactured with high-quality materials and advanced manufacturing technology, it reduces internal friction, limits compression losses and improves engine stability throughout the rev range. Its design also enables better thermal management to reduce the risk of overheating and premature wear. Ideal for OE-compliant upgrades or light preparation, it helps extend the life of the top end while maintaining consistent, reliable performance.

Fits on :

YAMAHA WR 250 1991

YAMAHA YZ 250 1991

YAMAHA YZ 250 1990

YAMAHA YZ 250 1989

YAMAHA YZ 250 1988