Seller notes

Athena 290cc Big Bore Top End Gasket Kit P400485160017 for Yamaha WR250R/WR250X Product Details Replacement top end gasket kit only for machines equipped with Athena Big Bore cylinder kit (sold separately)Does not fit stock engineMade in Italy NOTE: Only fits machines with Athena 290cc Big Bore Kit (sold separately). Fit GuideModelBig Bore Top End Gasket KitBore83mmCompression Ratio12.7:1Country of OriginItalyDisplacement290cc Product Fitment This item fits the following applications:Yamaha WR25...

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