Intake and exhaust valves for Honda CB500 and CB550 fours.
Note: Sold as a set of Eight—Four intake valves and Four exhaust valves per set, enough for one engine. Shopping cart will show Qty x2 per order.
No top end rebuild is complete without a fresh set of valves. If you're rebuilding the cylinder head of a Honda CB500 or CB550 four motorcycle, Common Motor offers these high-quality intake and exhaust valves to replace your worn out OEM valves.
Our Common Motor Collective "Airlock" valves are better than the OEM part, engineered and produced by CMC specifically for use in vintage Honda 500 and 550-series fours. To produce these valves, we worked closely with one of the top OEM engine valve manufacturers in the world to fabricate them using modern materials designed to outperform the originals.
While replacing the valves, make sure to measure the valve guides and replace them if they're out of spec. While the head's off the engine, refresh everything with a set of new gaskets for your CB550.
Valve seats need to be inspected and touched up by a qualified machine shop if heavily pitted. Otherwise, you need to lap with the new valves to the old seats. Guides must be measured for excessive play or wear. Guides will need replacement before attempting to cut or lap valve seats.
