Description
A worn or damaged piston directly compromises combustion efficiency, throttle response, and engine longevity—especially on a high-revving two-stroke like the YZ125. The Wiseco 765M05400 restores factory performance with tighter tolerances and premium materials, giving you the reliability needed for consistent lap times and dependable off-road riding. Whether you’re rebuilding after a seized engine or upgrading for increased durability, this piston is engineered to deliver.
- Aerospace-grade aluminum alloy
- CNC-machined precision tolerances
- Optimized combustion chamber design
- Reduced skirt friction coating
- Increased torque output
- Yamaha YZ125 (1997–2004) specific fitment
- MPN: 765M05400
- Bolt-on installation
- OEM-equivalent performance
