Into a category filled with 400cc sport models, Kawasaki introduces a revolutionary supersport model. The Ninja ZX-4R mounts a 399 cc In-Line Four engine in a compact chassis. On the track or on the street, experience the exhilaration of the Ninja ZX-4R’s unprecedented power, intoxicating high-rpm wail, and sharp, nimble handling that will surely awaken the dormant supersport within you.