MOTORCYCLE ENGINES must be light weight and compact, and have a good power output. *They normally have between one and six cylinders .and can be cooled by Air OT Water. * The capacity of the combustion chamber varies from 49 cc to 1500 cc (cubic centimeters). * Two types of internal combustion engine are common : the four stroke which is used in cars. And the two stroke engine. A basic two stroke engine having only three moving parts. A) The crankshaft B) The connecting Rod C) and the piston But the power output is high. The engine fires every two strokes. (rather than every four) giving a power stroke revolution. Power is conveyed from the engine to the real wheel by the transmission system. This usually consists of a clutch, a gearbox, and a final drive system. Clutches are multiple devices, which run in oil. Gearboxes have five or six speeds and operated by foot pedal. Shaft and belt drive system are used in some cases, but chain drive to the
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