DUAL OVERHEAD CAMSHAFTS

Dual overhead cams, (DOHC), refers to individual camshafts used to operate the intake and exhaust valves. This allows greater flexibility in placing the valves in the combustion chamber at the optimum angle for maximum power. Separate camshafts allow the use of a lightweight and compact valve actuating system which is suitable for high RPM operation. On Suzuki DOHC models the camshafts are turned by a chain driven by the crankshaft. Suzuki has DOHC systems where the camshafts operate directly on the valves and systems that use a rocker arm mechanism between the camshaft and valve.