Description
Yamaha YZ125 owners running 1976–1982 models face inevitable piston wear under competitive riding conditions. The Wiseco 435M05800 kit addresses this head-on with a 2.00mm oversize bore and precision-engineered construction that restores lost compression while delivering measurable gains in throttle response and engine longevity. If you’re rebuilding after a top-end failure or proactively upgrading before the next race season, this kit ensures your engine performs at its peak without compromise.
- Manufacturer: Wiseco
- Part Number: 435M05800
- Application: Yamaha YZ125 (1976–1982)
- Bore Diameter: 58.00mm
- Oversize: 2.00mm
- Material: High-silicon aluminum alloy
- Surface Finish: Diamond-turned
- Expansion Rate: Low-expansion formula
- Thermal Properties: Enhanced heat dissipation
- Installation: Requires machine work (boring)
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