Engineered for the rigorous demands of competitive MX bikes and quads, this KPMI Top End Service Kit provides a comprehensive solution for high-performance rebuilds. The assembly features a 2618 alloy piston, fully CNC machined with a performance skirt coating, specifically designed to maintain stock compression ratios despite the effects of dished stainless valves. This piston is paired with a Black Diamond™ stainless steel conversion system that significantly enhances valve durability, ensuring consistent performance under extreme racing conditions.
The kit includes all necessary components for a complete top end overhaul, such as rings, clips, pins, and a Cometic top end gasket kit. It is equipped with KPMI® stainless steel Black Diamond™ valves in stock head diameter, alongside a lightweight racing spring kit compatible with high-performance cams. The included dual spring titanium retainer spring kit supports up to 0.440” intake and exhaust valve lift, delivering the precise mechanical integrity required for serious motorsport applications.