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 - Exhaust Inner 6K8-41122-A1 Complete Gasket Kit 6K8-W0001-00 Piston Kit 09-775M Full Gasket Kit 09-711189