Description
If you’re running a YZ250 and want to unlock measurable gains in power delivery and engine longevity, a quality piston kit is essential. Wiseco’s forged-aluminum construction delivers the precision and durability demanded by serious 2-stroke riders. This complete kit eliminates guesswork and gives you everything needed for a reliable, high-performance rebuild.
- Material: High-silicon forged aluminum
- Bore Diameter: 69.50 mm (+1.50 mm oversized)
- Fitment: Yamaha YZ250 1999–2001
- Engine Type: 2-stroke
- Included Components: Piston, rings, wrist pin, circlips
- Installation: Bolt-on replacement
- Design Focus: Combustion efficiency, throttle response
- Weight: Optimized for lightweight performance
- MPN: 605M06950









