So whats a Moped? Here's what Wikipedia has to say about it:

Honda Hobbit PA 50/Camino moped (European market)

A moped (/ˈmoʊpɛd/ MOH-ped) is a small motorcycle, generally having a less stringent licensing requirement than motorcycles or automobiles because mopeds typically travel about the same speed as bicycles on public roads. Mopeds by definition are driven by both an engine and bicycle pedals, the term is unequivocally not appropriate for the very specific design classic known as the scooter. Scooters are regulated similarly and travel at about the same speed as motorcycles^[1].

Some mopeds are of a step-through type design, while others are step-over designs, having a motorcycle-like frame, including a backbone and a raised fuel tank, mounted directly between the saddle and the head tube. Some resemble motorized bicycles. Most are similar to a regular motorcycle, but with pedals and a crankset that may be used with or instead of motor drive. Although mopeds usually have two wheels, some jurisdictions classify low-powered three- or (rarely) four-wheeled vehicles as a moped.