(1) It is designed to be operated on the ground upon wheels.
(2) It has a seat or saddle for use of the rider.
(3) It is designed to travel with not more than three wheels in contact with the ground.
(4) It is equipped with an independent power source that:
(a) Is capable of propelling the vehicle, unassisted, at a speed of not more than 30 miles per hour on a level road surface; and
(b) If the power source is a combustion engine, has a piston or rotor displacement of 35.01 to 50 cubic centimeters regardless of the number of chambers in the power source.
(5) It is equipped with a power drive system that functions directly or automatically only and does not require clutching or shifting by the operator after the system is engaged. [1983 c.338 §59; 1985 c.16 §19; 1997 c.400 §5; 2001 c.749 §25]