Kawasaki introduced the NINJA® ZX-10R sportbike to the world’s leading motorcycle journalists, they were told in no uncertain terms that this motorcycle represents the epitome of leading-edge power, performance and exhilaration. The NINJA ZX-10R’s design, which combines high technology with the latest innovations, including a high-output engine, ultra-narrow aluminum frame, ergonomic design and compact bodywork narrower than most 600cc sportbikes.With a bore and stroke of 76 x 55mm, the ZX-10R engine’s one-piece cylinder and crankcase assembly reduces weight and increases rigidity.The double overhead cams are machined from chromoly steel billet for strength, four valves per cylinder improve high-rpm breathing, and the forged, lightweight pistons offer high heat resistance to further enhance the bike’s power-to-weight ratio.