- Kawasaki
Model Year: 2025 Engine: Liquid-cooled, 4-stroke, in-line four Displacement: 399
Class-Leading Engine Performance
Kawasaki takes 400cc engine performance to a new level, achieving an unprecedented 57 kW (77 PS)* of power. The howl of the engine as it revs beyond 15,000 min-1 adds to rider exhilaration. A quick-revving nature and direct throttle response are complemented by a flexible character that offers strong low- to mid-range torque for city riding, as well as screaming high- rpm power ideal for sport or track riding. *JPN spec homologated figure measured under fixed conditions. Specifications vary by market. Figure may vary depending on environment. May not apply to every unit.
Ultra-Compact Nimble Supersport Chassis
A hallmark of the ZX series is razor-sharp handling with excellent feedback that inspires confidence, and the Ninja ZX-4R is no exception. This stems directly from Kawasaki’s WorldSBK racing efforts, and their work in developing the Ninja ZX-10R and Ninja ZX-6R. As a result, the Ninja ZX-4R offers a handling character similar to its siblings.
Premium Components and Features
Style meets substance with the Ninja ZX-4R’s high-class styling and high-grade package. Aggressive looks are complemented by premium features like TFT colour instrumentation providing clear information, integrated Riding Modes that link traction control and power modes for easy machine setup, and on the Ninja ZX-4R SE and ZX-4RR a quick shifter for fast, simple gear changes.
High-Grade Suspension
The Ninja ZX-4R’s ø37 mm inverted fork uses SFF-BP internals to offer both racetrack performance and everyday usability while the Horizontal Back-link rear suspension offers a progressive character. Offering increased adjustability, the Ninja ZX-4R SE and ZX-4RR’s ront forks include adjustable spring preload, and the Ninja ZX-4RR features a Showa BFRC lite rear shock—the same type seen on the Ninja ZX-10R.
High-revving Performance
With a redline beyond 15,000 min-1 indicating its screaming potential, this engine features racing-inspired technology also found on the Ninja ZX-10R. The high revs deliver a distinctive, exhilarating engine sound characteristic of a high-performance Kawasaki In-line Four.
Dual-direction KQS (SE/RR)
Allowing riders to take even greater advantage of the Ninja ZX-4R’s exhilarating engine character, the quick shifter enables clutchless upshifts and downshifts for seamless acceleration and easy deceleration.
World Superbike Inspired Chassis Design
Key chassis dimensions (centre of gravity position, swingarm pivot position, engine axis positions, caster angle, etc) were inspired by Kawasaki’s World Superbike Ninja ZX-10RR racer, bringing WorldSBK chassis design thinking to the 400cc class.
Smartphone Connectivity
Bluetooth technology built into the instrument panel allows connection to smartphones via the “RIDEOLOGY THE APP” smartphone application, enabling ridersto access instrument functions for an enhanced motorcycling experience .
Trellis Frame with Optimised Rigidity Balance
Designed using Kawasaki’s advanced dynamic rigidity analysis, this trellis frame made from high-tensile steel delivers the required balance of strength and chassis flex to achieve the Ninja ZX-4R’s nimble supersport-style handling.
Fierce Ninja ZX Styling
Befitting the most powerful machine in the 400cc class, the Ninja ZX-4R’s aggressive Ninja styling exudes a fierce aura of restrained power and explosive action.
Ergonomics for Control and Comfort
Naturally aggressive riding position (more forward-leaning than the Ninja 400’s, but still slightly relaxed) lets riders take advantage of the Ninja ZX-4R’s nimble handling. The fuel tank feels slim, promoting good contact with the bike, while the shape of the firm seat cushion facilitates rider weight shift during sport riding, and is comfortable for longer rides.
Integrated Riding Mode
Four integrated riding modes (Sport, Road, Rain or Rider (manual)) make it simple to select a level of traction control and power mode to suit the current riding conditions.
Ram Air Intake
Complementing the centrally positioned Ram Air intake, the side Ram Air duct, designed with feedback from the Ninja H2, routes air to the air cleaner box and contributes to stellar performance. Its aggressive look and intake sound add to the screaming In-Line Four experience, and visually identify the bike as one of Kawasaki’s Ninja ZX models
All-LED Lighting
From its twin headlights to its Ninja ZX-10R-inspired taillight, all lighting on the Ninja ZX-4R is LED.
Dual Front Disc Brakes
The ZX-4R’s two ø290 mm front brake discs and radial-mount monobloc calipers provide sure stopping power, while also offering excellent braking feel to inspire confidence both on the track and on the street.
TFT Colour Instrumentation with Circuit Mo
The 4.3” all-digital TFT colour instrumentation with selectable display modes (Normal, Circuit) clearly displays the most pertinent information, whether on the street or on the track. Circuit Mode shows the gear position, lap times, and rpm above 10,000 more prominently.
KQS - Kawasaki Quick Shifter
KQS (Kawasaki Quick Shifter) enables clutchless shifting.
KTRC (3-mode)
3-Mode KTRC (Kawasaki TRaction Control), Kawasaki's most advanced traction control system, offers a selection of modes to suit a variety of riding situations, from sport riding to touring.
Assist & Slipper Clutch
Based on racing technology, the Assist & Slipper Clutch acts as both a back-torque limiter and a self-servo mechanism that enables a lighter clutch lever pull.
Electronic Throttle Valves
Electronic Throttle Valves allow the ECU to deliver the ideal amount of fuel and air to the engine.
Smartphone Connectivity
Smartphone connectivity contributes to an enhanced motorcycling experience by enabling riders to connect to their motorcycle wirelessly.
Power Modes
Power Mode selection allows engine power delivery to be changed to suit the riding situation.
Horizontal Back-link Rear Suspension
Horizontal Back-link Rear Suspension arranges its shock unit horizontally, greatly contributing to efficient use of space and mass centralisation.
Economical Riding Indicator
The Economical Riding Indicator is a mark appearing on the instrument panel to indicate favourable fuel consumption, encouraging fuel efficient riding.
ABS
ABS (Anti-lock Brake System) ensures stable braking performance by preventing wheel lock during braking.
