Products PWC- YamahaGasket / O-Ring / Shim 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 - Exhaust Inner 6K8-41122-A1 O-Ring 93210-57M09 Connecting Rod Kit CR2906 Cylinder sleeve 496-44211-00