Description
If you’re running a YZ125 two-stroke, piston wear directly impacts throttle response, fuel efficiency, and overall engine longevity. The Wiseco 559M05750 is engineered to restore lost compression and deliver the snappy power delivery your bike demands. This 1.50mm oversize kit comes complete with rings and circlips, so you can get back on the track without sourcing additional components.
Technical Specifications:
- Bore: 57.50 mm
- Oversize: 1.50mm
- Material: High-silicon aluminum alloy
- Application: Yamaha YZ125 (2005–2021)
- Engine Type: 2-stroke
- Piston Rings: Included
- Circlips: Included
- Installation: Bolt-on replacement
- Fitment: Vehicle-specific
- MPN: 559M05750









