Here is the hierarchy along with their statutory definition (the section numbers of 28-101 are prone to change, they are accurate as of this writing in Sept 2007), in ascending order of power limits: Bicycle: §28-101 (6). Motorized Bicycle: §28-2516. Moped: §28-101 (33), see also §28-2513. Motorcycle: §28-101 (37).
electric motor for car