2005 KAWASAKI NINJA ZX6R Miles/KM: 104mi. / 167km. Price: $4000 Description: powering the zx6r is a liquid cooled, dohc, 16valve, 636cc, fourcylinder engine tuned for optimum performance, especially in the high rpm ranges. digital fuel injection and largebore 38mm throttle bodies with subthrottle valves, plus a centrally located ram air duct system works in conjunction with a digital ignition system to deliver precise throttle response through the entire rpm range.