Description
Your CR250R’s performance is only as strong as its internal components—and a worn or undersized piston directly limits throttle response, combustion efficiency, and reliability. The Wiseco 431M07150 is precision-forged to exact tolerances, delivering the durability and thermal stability your vintage two-stroke demands, whether you’re riding hard on the track or trail. This is the piston spec that separates consistent, powerful performance from gradual degradation.
- Bore Size: 71.50mm
- Ring Size: 1.5mm
- Material: High-silicon aluminum alloy
- Construction: Precision forged
- Fitment: Honda CR250R Elsinore 1978–1980
- Fitment: Honda ATC250R 1981–1984
- Installation: Requires engine removal and rebuild
- Part Number: 431M07150
