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 6K8-41112-00 Gasket - Muffler Damper 6K8-14749-00 Gasket - Valve Seat 61X-14613-A0 / 61X-14613-A1 O-Ring 925258