2013 Kawasaki Ninja® ZX -6R, 2013 Kawasaki® Ninja® ZX -6R The new 2013 Ninja® ZX -6R marks the return of a middleweight sportbike legend, three numbers that strike fear into the heart of the competition: six...three...six. It is a tradition born of street cred and racetrack domination, a performance boost offered at the same price as the competition s regular six hundreds, and it s a machine that screams Performance Counts! The new ZX-6R honors a dominating family tradition started ten years ago with the first 636, a revolutionary machine that blew-away the competition s 600 s on the street and won races against factory 750 s on the track.