Description
The Wiseco 68.50mm piston kit restores your YZ250 to factory specifications while delivering the durability and compression needed for consistent high-RPM performance on the track or trail. Factory pistons wear out—this kit rebuilds your engine with OEM-grade materials and premium coatings that resist ring blow-by and extend top-end life. Whether you’re preparing for race season or maintaining a well-used trail bike, this is the direct-fit replacement your YZ250 demands.
- High-silicon aluminum forging
- 68.50mm bore diameter
- Fits Yamaha YZ250 2002–2020
- E-coated crown and grooves
- Titanium nitride-coated rings
- Ultra-stiff strutted design
- Optimized ring groove geometry
- Enhanced compression sealing
- Reduced exterior machining
- MPN: 560M06850
- Bolt-on installation
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