Kawasaki Motors Corp., U.S.A. will be rebranding its cross-country competition KX motorcycle lineup to KX450X and KX250X.
The KX brand symbolizes the championship winning DNA instilled by Kawasaki, while the X-designation distinguishes these models as off-road competition motorcycles.

The KX450X and KX250X motorcycles are specifically designed to give you the off-road edge with cross-country features including 21-in. front wheel and 18-in. rear wheel, off-road ready suspension and brake components, side stand and a durable plastic skid plate.
Link: Kawasaki