Description
When you’re pushing your Honda 400 to the limit, OEM pistons become your bottleneck. WSM’s +.75 mm piston kit delivers the strength and thermal management you need to sustain higher RPMs and boost reliability under sustained load. The advanced MOS2 coating reduces friction while actively drawing heat away from critical ring groove areas—translating directly to more power and longer component life.
This is a complete bolt-in solution: one kit per cylinder includes pistons, rings, wrist pin, and improved E-clip design. No fabrication required, and additional ring sets are available separately if you’re planning multiple builds or refreshes.
- Oversized +.75 mm bore
- Piston, rings, pin included
- Meets/exceeds OEM quality
- MOS2-coated skirts
- Reduces friction significantly
- Draws heat effectively
- Specially hardened ring grooves
- Improved E-clip design
- Bolt-on installation
- Order one per cylinder
- Additional rings available
- MPN: 5022006K
