Description
If you’re rebuilding a Honda 400 engine and want to reclaim lost compression while maintaining reliability, a quality piston kit is non-negotiable. WSM’s +.75 mm oversize pistons deliver OEM-equivalent or better construction with purposeful engineering—MOS2 coatings that actively dissipate heat and reduce friction translate directly to improved power output and extended engine life. This is the foundation of a dependable rebuild.
- Fits: Honda 400
- Oversize: +.75 mm
- MPN: 5022806K
- Includes: Piston, rings, pin, clips
- Skirt coating: MOS2 (heat-dissipating)
- Ring groove: Hardened steel
- E-clip design: Improved
- Installation: One per cylinder
- Material quality: OEM-equivalent or better
- Additional rings: Available separately
- Installation type: Bolt-on (standard rebuild)








