Motorized drift trikes can be quite a lot of fun to ride. You could always buy one or build your own as colinfurze has done. This particular trike can go as fast as 50 mph. It lets you drift and spin like a pro. The below video shows how well this trike performs:
You are going to need a 125cc engine, battery, seat, bearings, wheels, and a few other parts to get started. More information is available here.