Description
If you’re running a YZ125 and want measurable gains in displacement-dependent power and throttle response, a quality piston upgrade is one of the most direct paths forward. The Wiseco 56.00 mm piston kit delivers a +2.00 mm bore increase—translating to real horsepower and torque improvements while maintaining the reliability your engine demands under high-RPM racing conditions. Built from premium materials and engineered to exact tolerances, this is a bolt-on solution for riders serious about extracting every bit of performance from their machine.
- Bore diameter: 56.00 mm
- Overbore size: +2.00 mm
- Fitment: Yamaha YZ125 (2005–2021)
- MPN: 845M05600
- Material: High-grade piston alloy
- Design: Lightweight, precision-engineered
- Installation: Standard tools required
- Displacement increase: Measurable
- Gasket set: Sold separately
- Compatibility: Stock and modified









