Valves Timing Gears

The inlet- and exhaust timing mechanism contains two gears. The outer gear (50 teeth), part of the cam carrier, is attached to two cam plates and rotates around the inner gear (45 teeth).

Each cam plate is shaped in the form of 5 cams and as the cam carrier is driven at nine-tenths of the engine speed, the engine overtakes the cam plates one every 10 revolutions, during which period the arms are operated 5 times.