"Moped" means every motorcycle or motor-driven cycle unless otherwise specified in this Traffic Code, which is equipped with two or three wheels, foot pedals to permit muscular propulsion and an independent power source providing a maximum of two brake horsepower. If a combustion engine is used, the maximum piston or rotor displacement shall be fifty cubic centimeters regardless of the number of chambers in such power source. The power source shall be capable of propelling the vehicle, unassisted, at a speed not to exceed thirty miles per hour on a level road surface and shall be equipped with a power drive system that functions directly or automatically only, not requiring clutching or shifting by the operator after the drive system is engaged. (WVaC 17C-1-5a)