Penton was a brand of off-road motorcycle introduced in 1968 by John Penton, a noted enduro rider on the dirt bike competition circuit, who was inducted into the AMA Motorcycle Hall of Fame in 1998. Penton approached the KTM company, which at the time made bicycles and mopeds, to build a light-weight off-road motorcycle. The first Penton motorcycles used a modified small-capacity Sachs engine with improved suspension and details. The early motorcycles made their mark in International Six Days Trials (now called the International Six Days Enduro) competitions, Enduro races like the Michigan Jack Pine Endurance Run, Scrambles and Motocross with riders such as future Motorcycle Hall of Fame members Billy Uhl and Carl Cranke. The most popular size was the 125cc (Six Day), but they were also made in 100 cc (Berkshire) and later, in 175 cc (Jackpiner, in 1972), 250 cc (Hare Scrambler, in 1973), and 400 cc (Mint, in 1974).