South Carolina

Motorcycle:

“every motor vehicle having no more than two permanent functional wheels in contact with the ground or trailer and having a saddle for the use of the rider, but excluding a tractor and a moped.”

Moped:

“a cycle, defined as a motor vehicle, with or without pedals, to permit propulsion by human power, that travels on not more than three wheels in contact with the ground whether powered by gasoline, electricity, alternative fuel, or a hybrid combination thereof. Based on the engine or fuel source, the moped must be equipped not to exceed the following limitations: a motor of fifty cubic centimeters; or designed to have an input exceeding 750 watts and no more than 1500 watts. If an internal combustion engine is used, the moped must have a power drive system that functions directly or automatically without clutching or shifting by the operator after the drive system is engaged.”