Seller notes

Wiseco Piston Kit 77mm YAMAHA WR250F YZ250F 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 Fits the following models: YAMAHA WR250F 2005-2009 YAMAHA WR250F 2011-2013 YAMAHA YZ250F 2005-2007...

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