This is the BNR Race piston. This is a custom design piston for xc and mx racing. This piston utilizing stock piston rings for the best wear and easy install. Its made by wiseco for us.
- Utilizes OEM Yamaha Rings
- Includes Rings,Wrist Pin Clips and Piston
- 13:1 High Compression
- Last longer and lower oil consumption with oem rings
- Skirt coated