Into a category filled with 400cc sport models, Kawasaki introduces a revolutionary supersport model. The Ninja ZX-4R mounts a 399 cm³ In-Line Four engine with class-leading performance in a compact chassis with proportions essentially the same as the Ninja ZX-25R. On the track or on the street, experiencing the exhilaration of the Ninja ZX-4R’s unprecedented power, intoxicating high-rpm wail, and its sharp, nimble handing will surely awaken the dormant supersport within you.