Description
When you’re pushing your Honda 300 to the limit, stock pistons become your weak point. The WSM Piston Kit delivers OEM-grade quality with engineered improvements—specifically the MOS2 coating on the skirts that actively dissipates heat and reduces friction, translating to more reliable power and extended engine life. This is the precision upgrade serious racers and builders choose when reliability and performance matter equally.
What’s Included:
- Piston with improved E-clip design
- Piston rings
- Wrist pin
- Retaining clips
Key Features & Benefits:
- MOS2 coating reduces friction
- Heat-dissipating piston walls
- Specially hardened ring grooves
- Nonabrasive skirt design
- Meets/exceeds OEM standards
- Additional rings available separately
Fitment & Installation:
- Honda 300 specific
- +.50mm overbore size
- Order one kit per cylinder
- Professional installation recommended
Specifications:
- Manufacturer Part : 5022305K
- Material: Aluminum alloy
- Coating: MOS2 (molybdenum disulfide)









