Description
If you’re running a KX250 hard enough to wear out the original piston, you need a replacement that matches your commitment to performance. The Wiseco 617M06640 delivers the precision bore diameter and lightweight construction required to maintain throttle response and power delivery across the entire RPM band—critical for both competitive racing and trail riding. Built from aerospace-grade aluminum with CNC accuracy, this piston kit gives you the durability to handle extreme conditions without sacrificing the reliability your engine depends on.
- 66.40 mm bore diameter
- Aerospace-grade aluminum construction
- High-silicon alloy composition
- CNC machined tolerances
- Pro-Lite lightweight design
- Increased compression ratio
- Superior heat resistance
- Quick throttle response
- Extended engine lifespan
- Complete kit included
- 2-stroke compatible
- KX250 1992-2001 fitment
