Page "Tricycle" Paragraph 58

Some tricycles are powered with motors, typically gasoline engines.

Depending on the design of the vehicle, motorized trikes may be categorized as motorcycles, motor scooters, or simply the three-wheeled counterpart to a motorized or electric bicycle.

The main difference between a motorcycle trike and a scooter trike is that motorcycles are sat on in a " saddle "- style seating ( as with a horse ), with the legs apart, and motorcycles have manual transmissions.

Scooters have a " step-through " seating style, in which the driver sits on a more chair-like seat, with the legs together ; as well, scooters have automatic transmissions.

While laypersons often associate the engine size as a dividing line between motorcycles and scooters, since a typical scooter has a small 50 cc engine, engine size is not one of the dividing lines, because some scooters such as the Burgman have 600 cc engines.