Description
A worn top-end forces you to choose between costly downtime and compromised performance—neither acceptable for serious riders. The Wiseco Piston Kit delivers a complete, engineered solution that restores your YZ250 to factory specifications or beyond, with forged strength designed to handle sustained high-RPM operation. Whether you’re refreshing a tired engine or building a reliable platform for competition, this kit gives you the precision fit and durability that separates quality rebuilds from corner-cutting ones.
- Fits: Yamaha YZ250 (1999–2023)
- MPN: SK1381
- Material: High-silicone forged bar
- Piston design: 2-cycle optimized
- Ring type: Wiseco-matched
- Includes: Pistons, rings, wrist pins
- Includes: Circlips, gasket kit
- Precision CNC-manufactured
- Installation: Professional top-end service
- Strength: Enhanced high-temperature durability
- Expansion: Reduced thermal growth









