BSA 650 A65 500 A50 Oil Line Manifold X-ring SET Lightning

Should be suitable for ALL unit 500 and 650 BSA, oem part # 68-0588.  X-rings to replace the nearly always leaky o-rings BSA used at the oil pipe junction under the engine.Doubling the surface sealing area, the rings work really well.  An alternate size also available for most singles, check the store.