Kentucky

Motorcycle:

“any motor driven vehicle that has a maximum speed that exceeds fifty (50) miles per hour, has a seat or saddle for the use of the operator, and is designed to travel on not more than three (3) wheels in contact with the ground, including vehicles on which the operator and passengers ride in an enclosed cab. Only for purposes of registration, “motorcycle” shall include a motor scooter, an alternative-speed motorcycle, and an autocycle as defined in this section, but shall not include a tractor or a moped as defined in this section.”

Motor Scooter:

“a low-speed motorcycle that is: (a) Equipped with wheels greater than sixteen (16) inches in diameter; (b) Equipped with an engine greater than fifty (50) cubic centimeters; (c) Designed to operate at a speed not to exceed fifty (50) miles per hour; (d) Equipped with brake horsepower of two (2) or greater; and (e) Equipped with a step-through frame or a platform for the operator’s feet.”

Moped:

“either a motorized bicycle whose frame design may include one (1) or more horizontal crossbars supporting a fuel tank so long as it also has pedals, or a motorized bicycle with a step-through type frame which may or may not have pedals rated no more than two (2) brake horsepower, a cylinder capacity not exceeding fifty (50) cubic centimeters, an automatic transmission not requiring clutching or shifting by the operator after the drive system is engaged, and capable of a maximum speed of not more than thirty (30) miles per hour.”