The name of these machines is not derived from Go-Kart ( a registered trade mark BTW) and the name Kart is used in racing the various classes internationally and manufactured by various companies. The origins of the name are probably from the 1920s, or thereabouts, lightweight "cycle cars". A similar modern concept but unpowered is the "gravity racers", glorified soap-box derby type downhill racers. Competitions are held in the UK and Europe. One UK event is held on the Cairngorm Mountain ski area road.