Overview

The 2025 Ninja ZX-4RR ABS is Kawasaki’s compact inline four-cylinder supersport, engineered for riders who want genuine race-bred character in a middleweight package. It brings high-revving performance, precise handling, and a comprehensive electronics suite to the Ninja lineup, making it as capable on the track as it is engaging on winding backroads.

Engine and Performance

At the heart of the ZX-4RR ABS is a 399 cc-class, high‑revving inline four-cylinder engine. Its smooth, linear power delivery and willingness to spin to very high rpm set it apart from parallel-twin alternatives, providing the throttle response and soundtrack enthusiasts expect from a true supersport. An assist and slipper clutch helps reduce lever effort and manages back-torque during aggressive downshifts, supporting confident corner entry.

Chassis, Suspension, and Brakes

A lightweight, rigid frame works with a track-focused suspension package to deliver quick turn-in and mid-corner stability. The bike features a Showa SFF-BP front fork with adjustability and a horizontal back-link rear shock tuned for consistent feedback under hard braking and acceleration. Strong stopping power comes from twin front discs with radial-mount calipers, supported by ABS for controlled braking across varying surfaces.

Electronics and Rider Aids

The ZX-4RR ABS integrates Kawasaki’s rider support technologies to help you tailor the ride. Multi-level traction control, selectable power delivery, and integrated riding modes allow quick setup for changing conditions. A factory quick shifter enables clutchless upshifts and downshifts, promoting smoother acceleration and more stable corner entries on track days.

Ergonomics and Design

Compact, aggressive ergonomics place the rider in a commanding, front‑biased position without sacrificing everyday comfort. Aerodynamic bodywork with a centrally mounted intake duct reflects the Ninja family’s supersport DNA, while full LED lighting enhances visibility and modernizes the profile.

Technology and Connectivity

A color TFT instrument panel provides clear, at‑a‑glance information with selectable display modes and smartphone connectivity via Kawasaki’s app, enabling ride logging and basic notifications when paired.