Since 2002, the Motocross on ATV began rapidly growing in popularity in the United States. This was a direct result of the manufacturers’ entry into new sports. Let’s begin from the past. Racing on ATV started in the mid 80th when Honda, Kawasaki, Suzuki and Yamaha launched a new line of sport ATV which didn’t found popularity because of the publications in the press about the danger of these vehicles. Since then, and until the end of 1990th, third party companies supported this sport, but quite at a low level. Road racers collected expensive, custom made Quad bikes from parts of manufacturers such as Laeger's, Walsh Race Craft and Lonestar Racing. Engines were taken from the old (86-89) Honda TRX250R. Over the time, the refined suspensions allowed ATVs compete with cross motorcycles.

However, honestly saying it was necessary to spend $ 20,000 in order to make normal Quad for the race. At the end of 1990th the rules changed, and allowed the riders to use motorcycle engines in combination with the special frames. The era of four-wheeled bikes began with Harold Goodman, who won a national championship on a 4-wheeled ATV with an engine of YZ400F. Soon hybrid vehicles have become a commonplace on the track.

Manufacturers begun to pay more attention to ATV’s market, and in 1999 Honda produces four wheeled TRX400EX. It was not as powerful as custom hybrids, but at least the step was made. In 2001, Cannondale entered the ATV market and created racing team, in partnership with Nac's Racing. However, a history of Cannondale was brief, and the company declared bankruptcy in 2002. In 2003 Suzuki produces LT-Z400 with a liquid-cooled engine and a four-stroke engine. In the same year, ATVA introduces a special class of Quad Bikes at national competitions.

At the end of the 2003, Yamaha presents YFZ450 model line. This Quad is the first representative of the professional sport ATV, which is positioned as a pure racing vehicle. It was not as broad as others; it did not have long-stroke suspension, but had a great four-stroke engine, the analog of cross ones. It was the first Quad Bike with the adjustable front suspension. Next for Yamaha, Honda also announced a new Quad in 2004 TRX450R – that was also intended for professional sport.