Jet Air System: Description

The Jet Air System uses an additional valve in the top of each combustion chamber to inject a high velocity stream of air at small throttle openings. On the intake stroke, air rushing out of the jet valve opening scavenges gases from around the spark plug and produces a strong swirl in the combustion chamber. This promotes high combustion efficiency and results in lower exhaust emissions. The jet valve is operated by an extension on the intake valve rocker arm. The valve assembly consists of a jet valve, jet body and spring. The assembly is screwed into the jet piece, which is press-fitted in the cylinder head with the jet opening toward spark plug.