What is "minigpx"

Mini Grand Prix is a form of motorcycle racing involving the use of small machines, usually in the 50 cc class, that are modeled on their much larger Grand Prix counterparts. Not to be confused with pocketbikes which do not shift and have a top speed of 50 mph, Mini GPX bikes are fully functional motorcycles scaled to fit a typical seven-year-old.

Usually run on go-kart tracks, the sport has only recently become popular in the United States with most important events still held in Canada or other countries.