A little information about Motorcycle Trikes / 3 Wheel Scooters!

A tricycle (often abbreviated to trike) is a three-wheeled vehicle. While tricycles are often associated with the   small three-wheeled vehicles used by pre-school-age children, they are also used by   adults for a variety of purposes. In the United States and Canada, adult-sized   tricycles are used primarily by older persons for recreation, shopping, and   exercise. Human-powered trikes are usually powered by pedals, although some models have   hand cranks. Motorized trikes can be powered with a variety of methods,   including motorcycle engines,   smaller automatic transmission scooter motors, and electric motors. Scooters are motor vehicles that can vary   significantly in design and capability, but are generally derived from a   traditional design combining a step-through frame with front fairings and floor   boards, inner fairing storage, small wheels (10" to 16" in diameter), and a rear   swingarm-mounted engine suitable for light duty. The classic scooter design   features a step-through frame and a flat floorboard for the rider's feet. Most   newer scooters use a continuously variable   transmission (CVT). While most scooters have two wheels, some scooters are   three-wheeled scooter trikes.Most scooter trikes have two rear wheels which are the drive wheels and a   front wheel which is used for steering. Some first decade of the 21st   century-era scooter trikes such as the Piaggio MP3 are reverse trikes, with two wheels in   front and one in the back. The MP3 leans like a 2-wheeled bike, with the front   wheels moving independently in a scissors action.