55-8-101 Definitions:
(31) “Motor vehicle” means every vehicle, including a low speed vehicle as defined in this section, that is self-propelled excluding motorized bicycles and every vehicle, including a low speed vehicle as defined in this section, that is propelled by electric power obtained from overhead trolley wires, but not operated upon rails;
(32) “Motorcycle” means every motor vehicle having a seat or saddle for the use of the rider and designed to travel on not more than three (3) wheels in contact with the ground, including a vehicle that is fully enclosed, has three (3) wheels in contact with the ground, weighs less than one thousand five hundred pounds (1,500 lbs.), and has the capacity to maintain posted highway speed limits, excluding a tractor or motorized bicycle;
(33) “Motor-driven cycle” means every motorcycle, including every motor scooter, with a motor which produces not to exceed five (5) brake horsepower, or with a motor with a cylinder capacity not exceeding one hundred twenty-five cubic centimeters (125cc);
(34) “Motorized bicycle” means a vehicle with two (2) or three (3) wheels, an automatic transmission, and a motor with a cylinder capacity not exceeding fifty cubic centimeters (50cc) which produces no more than two (2) brake horsepower and is capable of propelling the vehicle at a maximum design speed of no more than thirty miles per hour (30 mph) on level ground. The operator of a motorized bicycle must be in possession of a valid operator's or chauffeur's license, and shall be subject to all applicable and practical rules of the road. A motorized bicycle may not be operated on a highway of the interstate and defense highway system, any similar limited access multilane divided highway, or upon sidewalks;http://www.michie.com/tennessee/lpext.dll?f=templates&fn=main-h.htm&cp=tncodeThe following is WHO must have a Motorcycle License:
50-50-102 (2):
(F) Class M. This license is valid for all motorcycles, including all motor-driven cycles. This license classification may be added to a license valid for any other class, or it may be issued as the only classification on a license if the applicant is not licensed for any other classification. A Class M-limited license may also be issued and is valid for all motor-driven cycles, including mopeds, but not for larger motorcycles;http://www.michie.com/tennessee/lpext.dll?f=templates&fn=main-h.htm&cp=tncodeIn short, Tennessee seems to be like Pennsylvania, you do NOT need a Motorcycle License to drive a Moped with an engine 50cc or smaller BUT YOU STILL NEED TO HAVE A REGULAR DRIVER'S LICENSE. Please note Tennessee seems to have a "limited" license for Mopeds, something Pennsylvania gave up on years ago.