Most mopeds can be ridden as a bicycle or a motorcycle. On most mopeds, you can pedal all you want and then when you want the engine to start, you pull a lever that causes the turning of the rear wheel to turn the engine and start it. Some of them you can pedal slowly, but as soon as the pedals get to a certain speed, it starts the engine, so if you want the engine to stay off, you have to pedal about 3-5 miles per hour. That's how the vespa's are. Then, some tomos mopeds start when pedaled backwards, but ride like a bicyle otherwise.