A motorcycle engine propels a motorcycle. The engine typically sits immediately under the fuel tank, in between and just forward of the rider's legs.
Types
Almost all commercially available motorcycles are driven by conventional gasoline internal combustion engines, increasingly four-strokes in all size ranges. The mid-range and large two-strokes seen in the 1970s and 1980s have almost disappeared, particularly as emission laws were introduced. There are a few small scooter-type models using batteries and an electric motor. Two manufacturers in the 1980s produced quite small numbers of motorcycles propelled by Wankel rotary engines, but these were neither clean, nor economical nor particularly reliable.
Almost all commercially available motorcycles are driven by conventional gasoline internal combustion engines, increasingly four-strokes in all size ranges. The mid-range and large two-strokes seen in the 1970s and 1980s have almost disappeared, particularly as emission laws were introduced. There are a few small scooter-type models using batteries and an electric motor. Two manufacturers in the 1980s produced quite small numbers of motorcycles propelled by Wankel rotary engines, but these were neither clean, nor economical nor particularly reliable.
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