Description
The piston is the heart of your YZ125’s engine—responsible for transferring combustion force into usable power. A worn or stock piston limits your bike’s potential, reducing compression efficiency and increasing blow-by. The Wiseco 846M05800 restores and exceeds OEM performance with a precision-engineered design that delivers measurable gains in throttle response and peak horsepower while maintaining the reliability you need for consistent trail or track performance.
This complete kit includes pistons, rings, and pins sized specifically for the YZ125 and YZ125X, eliminating guesswork during installation. Wiseco’s advanced aluminum alloy and enhanced scuff-resistant coating extend piston life under aggressive riding conditions, making this a smart investment for serious riders looking to maximize engine longevity alongside performance gains.
- Wiseco MPN: 846M05800
- Fitment: Yamaha YZ125, YZ125X
- Material: High-grade aluminum alloy
- Includes: Piston, rings, pins
- Installation: Bolt-on replacement
- Coating: Scuff-resistant
- Engine type: 2-stroke
- Improved compression efficiency
- Enhanced throttle response
