Kawasaki Ninja ZX-4RR 2026 — Specifications

There's sport, and there's riding. The difference lies in the art of trajectory, the search for a taut and sharp curve, the pleasure of exploiting every watt and always staying on the edge.

This pursuit at the limit of bushido is the very reason for the ZX-4RR. A track bike as we hadn’t dared to hope for. Small in displacement but nonetheless attractive with the promises it exudes. Don’t believe for a moment that this is just a Ninja 400 that’s been spiced up a bit. In truth, it’s a bundle of nerves waiting for hysteria.

The young lady does honor to the Ninja lineage. Silhouette very close to the ZX-6R 636, Ninja 650, and Ninja 400, with a racing instinct and a tortured fairing – the Kawa identity expresses itself completely, under the shadow of the ZX-10R. Indeed, it borrows the rear fire, the KRT replica color scheme, and the same engine architecture. And that’s where the sublimation begins.

With the ZX-4R, Kawasaki brings back 4-cylinder engine technology in a pocket format. Yes, 4 small spaces of 100 cm3, where the revs will soar more than is reasonable. Forget about cruising along singing or strolling along on the torque. Its maximum is so high that you won’t even think about winding it in... but about scraping it! The small 399 cm3 block, double ACT, 16 valves, develops an incredible amount of power in this displacement class: 77 horsepower! A powerhouse that even reaches 80 horsepower with the forced air intake system. That’s almost 80% more power than the 400 Ninja cousin and competitors in the same sector.

The concern, but also the pleasure, of this type of powerhouse is that the power is high in the rev range. On the ZX-4RR, you’re going to have to chase it at 14,500 rpm. Hence the thrill of going to capture this power, keeping the tachometer in a five-digit zone, brushing against the red zone beyond 15,000 rpm. And making sure to take the corner with your foot on the gas. That’s why you’re going to choose an RR rather than an R: in order to refine its cycle part and be more effective.

The ZX-4RR isn’t just distinguished by its green color scheme. It also features an Up&Down quickshifter; essential for a sportiness worthy of the name. Riding science then continues with suspension settings, which the R cannot boast. The Showa SFF-BP large-piston inverted fork receives preload adjustment here. The BFRC Lite rear shock (also Showa) offers even more possibilities, with adjustment of compression, rebound, and preload.

The steel trellis frame isn’t as noble as a good old perimeter aluminum one but it should do the job. Those who knew the VFR 400 and ZXR 400 will find the pill a little hard to swallow. However, the younger ones will be delighted to enjoy a 4.3-inch color TFT screen, with a beautiful racing display in addition to the standard mode, a Bluetooth connection to connect the smartphone, and control over the on-board electronics. The ZX-4R features a 3-level KTRC traction control + off and 2 power modes. The assistance is controlled by 4 Riding Modes: Sport, Road, Rain, and Rider. The latter allows you to parameterize the aids to your liking.

Where the ZX-4RR falls short is its weight. At 189 kilograms, this 400 isn’t particularly light. A KTM RC 390 weighs 25 kilograms less. You could even push the vice to compare it to its grandmother from the 90s, which weighed less than 160 kilograms...... but only produced 65 horsepower. This time difference allows us to see the evolution of engine performance. But also the standards that have only added weight over the years. While significantly reducing emissions. The Kawa passes Euro5, apparently without losing any horsepower in the process.

With this dog in a game of skittles, Kawasaki soars over the 400 category. The ZX-4R / RR can tease the Yamaha R7 700 and many machines of the same displacement in terms of power. But don’t believe for a moment that they play in the same league. Negotiate the curve without a high engine speed and you’re going to leave the others behind, with their higher displacement and more readily available torque. But the Kawasaki ZX-4RR doesn’t conceive of things that way. It only sees the trajectory, and it’s by maintaining it with its howling 4-cylinder that the pleasure will be released; for the rider as well as for it.

M.B - Photos constructeur