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 - Muffler Damper 6M6-14739-00 / 6M6-14739-A1 Gasket - Exhaust Pipe 66V-14613-00 Piston Kit 09-831-01 Piston Kit 09-780-03