Wiseco Piston Kit with Gaskets 55mm 2001 Yamaha YZ125 PK1350

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