Motorcycle Crankcase Covers Cylinder Seal Set Fit For CRF250R 2004-2009 CRF250X 2004-2017 CRF 250R 250X; full set includes crankcase cylinder cover gaskets matching engine housing layout die cut OEM shape with aligned mounting holes; direct bolt on assembly without extra or grinding tight sealing surface blocks oil seepage; maintains stable sealing effect under temperature offroad operation density composite material; uniform compression pressing craft; consistent texture on entire gasket surface OEM matched uniform thickness overall dimension; balances bolt clamping force to gasket deformation