The Japanese automaker Yamaha produces a range of mini bikes, or pocket bikes that are perfect for zipping around the race track or as a gift for a budding biker. These have strong aftermarket followings and are often used in spec racing. Mini bikes are sometimes re-shaped and scaled down versions of full-size models - for example, the Yamaha YSR50 sport minibike is reminiscent of the Yamaha YZR 500.