While the standard ZX-4R rewrites the 400cc rulebook, the Ninja ZX-4RR takes things even further. This is the premium version of Kawasaki’s screaming inline-four supersport—a bike that adds track-focused componentry and rider aids to an already impressive package. For riders who want every advantage on canyon roads or track days, the RR delivers refinement that elevates the entire experience.
The RR shares the same intoxicating 399cc inline-four as its sibling—55.0 kW (75 PS) at 14,500 rpm with that spine-tingling ability to rev beyond 15,000 rpm. What sets it apart is how you interact with that power. The RR includes Kawasaki’s KQS (Kawasaki Quick Shifter) system, offering clutchless upshifts and downshifts. This dual-direction quick shifter transforms the riding experience, allowing you to keep focus on the road ahead while hammering through gears—whether accelerating out of corners or trail-braking into them. Combined with ram air intake and the flexible torque delivery, it’s performance that’s as usable on real roads as it is thrilling on track.
Beyond the quick shifter, the ZX-4RR maintains all the electronic sophistication of the standard model—integrated riding modes linking KTRC traction control and power selection, full-color TFT instrumentation with smartphone connectivity, and Circuit Mode for track use. But the RR adds adjustability where it counts. The front suspension includes spring preload adjustment, while the rear BFRC lite gas-charged shock features a piggyback reservoir with compression and rebound damping adjustability along with spring preload. This means you can fine-tune the bike’s character to match your riding style and conditions, from aggressive track sessions to spirited road rides.
Visually, the ZX-4RR carries the same fierce Ninja ZX styling that announces its supersport intentions. The aggressive lines, LED lighting, and ram air-stamped intake all project purpose and performance. But the real elegance lies in the details—the higher-spec suspension components, the quick shifter hardware, and the premium finish that mark this as the flagship of the ZX-4 range. It’s a machine that looks fast standing still and backs up its appearance with substance.
The Ninja ZX-4RR is for riders who want the best of what the 400cc supersport world can offer. If you’re serious about track days, appreciate suspension adjustability, and want the seamless gear changes that a quality quick shifter provides, the premium the RR commands is worth every penny. It’s still compact, nimble, and accessible—but with componentry and features that let experienced riders extract every ounce of performance. This is the screaming four-cylinder experience at its absolute finest.
| Maximum Power | 55.0 kW {75 PS} / 14,500 rpm | Maximum Power with Ram Air | 56.7 kW {77 PS} / 14,500 rpm |
| Maximum Torque | 37.6 Nm {3.8 kgfm} / 12,500 rpm | Engine | 4-stroke In-Line Four |
| Displacement | 399 cc | Bore x Stroke | 57.0 x 39.1 mm |
| Compression Ratio | 12.3:1 | Valve System | DOHC, 16 valves |
| Fuel System | Fuel injection: ø34 mm x 4 | Ignition | Digital |
| Starting | Electric | Cooling | Liquid-cooled |
| Lubrication | Forced lubrication, wet sump | Transmission | 6-speed, return |
| Primary Reduction Ratio | 2.029 (69/34) | Gear Ratio: 1st | 2.929 (41/14) |
| Gear Ratio: 2nd | 2.056 (37/18) | Gear Ratio: 3rd | 1.619 (34/21) |
| Gear Ratio: 4th | 1.333 (32/24) | Gear Ratio: 5th | 1.154 (30/26) |
| Gear Ratio: 6th | 1.037 (28/27) | Final Reduction Ratio | 3.429 (48/14) |
| Clutch | Wet multi-disc, manual | Final Drive | Chain |
| Frame | Trellis, high-tensile steel | Front Suspension | ø37 mm inverted fork (SFF-BP) with spring preload adjustability and top-out springs |
| Rear Suspension | Horizontal Back-link, BFRC lite gas-charged shock with piggyback reservoir, compression and rebound damping and spring preload adjustability, and top-out spring | Front Wheel Travel | 120 mm |
| Rear Wheel Travel | 124 mm | Rake | 23.5° |
| Trail | 97 mm | Steering Angle (L/R) | 35° / 35° |
| Front Tyre | 120/70ZR17M/C (58W) | Rear Tyre | 160/60ZR17M/C (69W) |
| Front Brake/s | Dual semi-floating ø290 mm discs | Front Caliper/s | Dual radial-mount, monobloc, opposed 4-piston |
| Rear Brake | ø220 mm disc | Rear Caliper | Single-piston |
| Dimensions (LxWxH) | 1,990 x 765 x 1,110 mm | Wheelbase | 1,380 mm |
| Road Clearance | 135 mm | Seat Height | 800 mm |
| Curb Weight* | 188 kg | Fuel Capacity | 15 litres |
