Seller notes

Wiseco Piston Kit 77mm YAMAHA YZ250F YZ250FX WR250F Lightweight forging for instant throttle response and maximum torque . Computer engineered piston skirt profiles provide minimal cylinder wall friction . Piston kit includes piston, rings, wristpin and circlips. Specs: Oversize: Standard Bore Size: 77mm Compression Ratio: Standard Special Notes:*13.5:1 compression ratio Fits the following models: YAMAHA WR250F 2015-2017 YAMAHA YZ250F 2014-2015 YAMAHA YZ250FX 2015-2016...

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