Description
The Wiseco Piston Kit is engineered for 2-stroke performance demands where ring seal integrity and thermal stability directly impact horsepower delivery and engine longevity. If you’re running your RM250 at competitive levels or pushing it hard on the trail, a quality piston kit is non-negotiable—worn pistons cause compression loss, increased blowby, and accelerated cylinder wear. This kit restores factory performance specs while delivering the tight tolerances and premium materials that separate reliable engines from ones headed for a rebuild.
- High-silicon aluminum alloy
- CNC-machined precision tolerances
- 69.00mm bore diameter
- Fits RM250 1989–1995
- 2-stroke optimized design
- Improved throttle response
- Extended service intervals
- Bolt-on installation
- MPN: 642M06900
