Motorcycles Motorcycles have been around for a long time. They are much faster than bicycles. Motorcycles have an engine that starts with a key. Did you know that the first Harley Davidson only went 40 mph? There are different types of motorcycles, some are for racing and some are just to cruise around. Ther is even a dirtbike you want ride in the dirt. Motorcycles can go in dirt, but will not ride as well as a dirtbike. Dirtbikes are made for off-road riding.