WOSSNER offers you a valve kit specially designed for motocross use, enabling you to refurbish and optimize the timing system of 4-stroke engines. These complete kits generally include valves (intake or exhaust) combined with appropriate springs, guaranteeing reliable, consistent engine operation. Designed for motocross and enduro, they make the top end of the engine more reliable, improve valve operation and extend engine life, while simplifying the rebuild operation with a ready-to-install kit.