It can be understandably frustrating in trying to make sense of the many ATV classes and quad configurations to consider. There was a time when this was the case (back when racers were competing on 2-strokes), but these days there are literally dozens of bone-stock quads that can hold their own in motocross competition on down to hare scrambles and poker runs. The key is to determine which type of terrain you feel most comfortable with.

ATV Source provides the full explanation of the ATV racing types.