Description
If you’re building serious displacement on your Kawasaki 300, piston quality directly determines how long your engine survives at high RPM. WSM’s +1mm piston kit delivers OEM-equivalent construction with critical upgrades—a hardened crown for ring groove durability and a friction-reducing MOS2 coating that actively draws heat away from the piston. This isn’t cosmetic improvement; it’s measurable gains in reliability and power retention under sustained load.
The improved E-clip design eliminates a common failure point, while the specialized skirt coating reduces friction losses that rob you of horsepower. Order one kit per cylinder and pair with optional replacement rings for a complete refresh.
- Kawasaki 300 specific
- +1mm oversized bore
- Piston, rings, pin, clips included
- OEM-equivalent quality
- Hardened crown design
- MOS2 friction-reducing coating
- Heat-drawing skirt technology
- Improved E-clip design
- Additional rings available separately
- One kit per cylinder
- MPN: 50-255-07K








