2011 Kawasaki KX100, Stepping Stone to Motocross! - The Stepping Stone to Big-League Motocross The gulf between a KX 85 and a full-sized Lites-class motocrosser such as the KX250F is a large one, and rare is the rider who bridges the transition easily. All of which explains the existence of Kawasaki s KX100 the ideal stepping stone from minis to the major leagues. With its larger wheels, the KX100 provides adolescent motocross racers and off-road riders with a right-sized motorcycle, one that allows them to focus on riding technique instead of excessive power and heft.