Description
Piston durability and heat management directly impact engine longevity and power output, especially in high-stress racing applications. The WSM +.25mm piston assembly delivers OEM-quality construction with proprietary MOS2 skirt coating that reduces friction while actively dissipating heat away from the combustion chamber. This is a complete, ready-to-install assembly—order one per cylinder and you’re equipped with a proven upgrade that extends engine life without sacrificing performance.
- OEM-equivalent quality construction
- +.25mm oversized specification
- Complete assembly: piston, rings, pin, clips
- Improved E-clip design
- MOS2-coated skirts
- Heat-dissipating coating technology
- Friction-reducing surface treatment
- Hardened ring groove tops
- Additional rings sold separately
- Bolt-on installation
- Yamaha fitment
- MPN: 010-872-04K
