Products PWC- Yamaha500 CC Back Gasket - Upper Casing 6K8-45113-00 Item number: 6K8-45113-00 Fit on models: 1989 Yamaha WR500F CRANKSHAFT - PISTON You May Also Be Interested In Gasket - Manifold 6K8-13556-00 Screw, Pan Head 98580-05016 Gasket 420-430-486 / 430486 Oil Seal 420-831-955