Description
The Wiseco Piston Kit delivers precision engineering where it matters most—inside your YZ250F’s combustion chamber. A properly matched piston assembly is critical for maintaining compression ratios, maximizing power transfer, and ensuring long-term engine reliability. This kit replaces worn or damaged pistons with OEM-spec components that restore your four-stroke’s performance baseline.
Wiseco’s manufacturing process tolerances are tight enough to guarantee smooth ring sealing and consistent compression across the entire RPM range. Whether you’re rebuilding after a top-end failure or upgrading a tired engine, this 12.7:1 compression piston restores efficiency without requiring internal modifications.
- Fits: YZ250F 2001-2004
- Bore diameter: 77mm
- Compression ratio: 12.7:1
- MPN: 4872M07700
- Piston only kit
- High-strength aluminum alloy
- Precision-engineered tolerances
- Lightweight design
- Gasket set: Sold separately
- Installation: Top-end removal required






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