Into a category filled with 400cc sport models, Kawasaki introduces a revolutionary Supersport model.

Electronic throttle valves also enable more precise control of electronic engine management systems like S-KTRC and KTRC, and allow the implementation of electronic systems like KLCM, Kawasaki Engine Brake Control, and Electronic Cruise Control.

Powertrain: Engine, Transmission, and Performance At the heart of the ZX-4RR is a liquid-cooled DOHC 16-valve inline-four displacing 399cc. Bore and stroke measure 57.0 x 39.2mm, which is almost identical to the 1990 ZXR-400R, which measured 57.0 x 39.0mm and displaced 398cc.