The first Rupp karts introduced were called Dart Karts. He also won the 2002 Rock Island GP in 125cc Shifter Karts. Zanardi began racing karts at age 13. He began racing at the age of seven in outlaw karts in Northern California. However, the high cost of racing karts led to the decision to race minimoto exclusively. Stevens started his racing career in 2003 at age of 12 in karts. There are also spotlight drivers, karts, and gliders while a tour lasts for two weeks. Some British and Australian classes also include 125 cc gearbox karts. The company produced automobiles, karts and planes. After a short stint with CRG-built Zanardi karts, Verstappen returned to the factory CRG team. In 1959, McCulloch was the first company to produce engines for karts. The track uses environmentally friendly electric karts that produce 20-horsepower. They featured eight of the characters in karts that were customizable with stickers. Spencer helped him to observe and concentrate on how his fellow competitors drove their karts. The biggest and baddest division in outlaw karts is the open division.