Safety issues with 3 wheel ATVs caused all manufacturers to switch to 4 wheeled models in the late '80s, and 3 wheel models ended production in 1987, due to consent decrees between the major manufacturers and the Consumer Product Safety Commission the result of legal battles over safety issues among consumer groups, the manufacturers and CPSC. The lighter weight of the 3 wheel models made them popular with some expert riders. Cornering is more challenging than with a 4 wheeled machine because leaning into the turn is even more important. Operators may roll over if caution isn't used. The front end of 3 wheelers obviously has a single wheel making it lighter, and flipping backwards is a potential hazard, especially when climbing hills. Rollovers may also occur when traveling down a steep incline. The consent decrees expired in 1997, allowing manufacturers to once again make and market 3 wheel models, though there are very few marketed today. Sport models are built with performance, rather than utility, in mind. To be successful at fast trail riding, an ATV must have light weight, high power, good suspension and a low center of gravity. These machines can be modified for such racing disciplines as motocross, woods racing also known as hare scrambles, cross country, desert racing, hill climbing, ice racing, speedway, TT Tourist Trophy, flat track, drag racing and others. Examples of high performance models include the Yamaha YFZ450, Honda TRX450R,Suzuki QuadRacer R450, Kawasaki KFX450R, and Can Am DS450.

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