Description
When you’re running a 2-cycle engine hard, piston failure isn’t just an inconvenience—it’s a race-ender. The Wiseco Piston Kit delivers the thermal stability and durability you need to keep your YZ125 performing at the edge without worrying about seizure or premature wear. This complete top-end rebuild kit gives you everything required for a proper engine refresh, keeping your machine competitive whether you’re on the track or the trail.
Built from high-silicone forged material, Wiseco pistons expand less under heat than cast alternatives, which means tighter piston-to-cylinder clearances and more reliable operation at sustained high RPM. The included ring set, wrist pins, circlips, and gaskets are all engineered to work together as a system—no guessing about compatibility or sourcing mismatched components.
- Fits: 2001 Yamaha YZ125
- Bore: 55mm
- High-silicone forged construction
- Lower thermal expansion
- Includes piston rings
- Includes wrist pins
- Includes circlips
- Includes top-end gaskets
- Precision-engineered fit
- Optimized 2-cycle design
- Bolt-on installation
- MPN: PK1350
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