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 Piston 6K8-11631-00 / 6K8-11635-00 / 6K8-11636-00 Gasket - Hole Cover 6K8-81365-00 Piston Ring 66V-11603-00 / 66V-11604-00 / 66V-11605-00 Full Gasket Kit 09-711275