The 1985 GPZ600R was the first middleweight to offer engine, chassis and aerodynamic performance levels to rival those of larger-displacement models. This tradition continues with the 2005 Ninja ZX-6R.
The new model benefits from a host of modifications to engine, chassis and styling, offering improved performance on both the track and on twisty roads.
Engine developments include new cylinder heads, new cylinders, and oval-shaped sub-throttle valves fed by twin injectors for improved intake efficiency. Larger intake and exhaust valves operated by revised cam profiles also contribute to the overall performance increase, while an exhaust valve integral with the end can improves low and mid-range response.
In short, the new power plant delivers more power (especially on top end), has more linear power characteristics and is more fun to ride.
Form follows function in the stylish new cowl and underseat exhaust can, both of which improve the bike's aerodynamics. The new cowl moves the point where the boundary layer separates from the cowling forward. This not only reduces turbulence around the rider, it significantly shortens the point of convergence at the rear of the machine, greatly improving aerodynamic efficiency.
In fact, the new ZX-6R has the best drag coefficient of any Ninja to date - a feature worth approximately 10 PS at 156mph.
Chassis features include a new aluminium frame, an ultra-trick braced swingarm, a new fork, improved rear suspension settings, and new 10R-type wheels. The new chassis dimensions shorten the wheelbase and move the swingarm pivot point forward for improved cornering performance.
Race-bike features like a direct-action brake master cylinder, radial-mount calipers, petal front brake discs and a back-torque limiter tuned with feedback from Kawasaki's MotoGP machine further increase the 6R's potency on the circuit.
The bodywork that complements the new under-seat exhaust features styling cues from the MotoGP machine and the Ninja ZX-10R. New Ram-Air intake, new headlight design, integrated front turn signals and LED tail lamp give the new 6R an unmistakable resemblance to the 10R.
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