The Ninja ZX-4RR has additional circuit potential with upgraded suspension and dual-direction Kawasaki Quick Shifter. Light, easy to ride and highly capable, the screaming inline cylinder engine provides a unique superbike engine experience on every ride that only Kawasaki can offer.
Review – Key Features – Features & Benefits – Specifications
2025 Kawasaki Ninja ZX-4RR ABS: NIMBLE EXCITING PERFORMANCE.
Introducing the 2025 Kawasaki Ninja ZX-4RR ABS…
Kawasaki redefined the 400cc supersport category with the arrival of the Ninja ZX-4R. This circuit-focused motorcycle combines real-world road enjoyment and track riding potential while providing the rider the satisfaction of being able to ride with confidence. The Ninja ZX-4R boasts a powerful 399cc in-line four-cylinder engine that produces music to the ears with its high-performance audible signal – helping it stand out from the competition. Its lightweight trellis frame is compact and nimble for exciting cornering performance, while 290mm dual front disc brakes and a high-performance 37mm Showa SFF-BP front fork as well as horizontal back-link rear suspension have been fitted to ensure that the Ninja ZX-4R breeds performance from the ground up. Other premium features include a 4.3” TFT color instrumentation with smartphone connectivity, integrated riding modes that link Kawasaki TRaction Control (KTRC) and Power Modes, and aggressive Ninja ZX family styling that make it clear this is a high-performance supersport model. The Ninja ZX-4RR takes performance even further with the addition of dual-direction Kawasaki Quick Shifter (KQS), a higher-grade Showa front fork with adjustable spring preload, and a Showa BFRC Lite rear shock.
The Ninja ZX-4R is the ultimate lightweight superbike experience, packing a high revving 400cc inline four cylinder engine into a compact trellis frame, while the Ninja ZX-4RR has additional circuit potential with upgraded suspension and dual-direction Kawasaki Quick Shifter. Light, easy to ride and highly capable, the screaming inline cylinder engine provides a unique superbike engine experience on every ride that only Kawasaki can offer.
2025 Kawasaki Ninja ZX-4RR ABS Totalmotorcycle.com Key Features
- 399cc IN-LINE 4-CYLINDER DOHC ENGINE
- RAM AIR DUCT INTAKE SYSTEM
- WORLDSBK-INSPIRED CHASSIS
- ALL-LED LIGHTING
- KAWASAKI TRACTION CONTROL (KTRC)
- High-grade front fork with adjustable spring preload
- High-grade Showa BFRC lite rear shock
- Kawasaki Quick Shifter (KQS) (Dual-Direction)
- HIGH-REVVING INLINE FOUR-CYLINDER ENGINE
- WORLD SBK-INSPIRED CHASSIS DESIGN
- HIGH GRADE SUSPENSION
- DUAL FRONT DISC BRAKES WITH MONOBLOC CALIPERS
- SPORTY YET COMFORTABLE RIDING POSITION
- TFT COLOR INSTRUMENTATION
KAWASAKI ANNOUNCES FALL RELEASE OF 2025 STREET MOTORCYCLES
No matter what type of motorcycle you’re looking for, Kawasaki’s 2025 lineup has the model for you as it welcomes the return of several hypersport, supersport, sport, retro classic, hypernaked, supernaked, mini naked, retro sport, cruiser, adventure touring, and dual-sport models to its street motorcycle lineup. These 2025 model-year motorcycles are set to arrive in Kawasaki dealerships during the fall months so that riders can continue to “Let the Good Times Roll.”
2025 Kawasaki Ninja ZX-4RR ABS Totalmotorcycle.com Features and Benefits
ENGINE
Developed with data from its World SBK Championship-winning Ninja ZX-10R and Ninja ZX-6R, the Ninja ZX-4R’s liquid-cooled, DOHC, 16-valve inline four-cylinder engine delivers impressive power and torque. There is a very linear power delivery that provides great street-going performance at lower engine speeds while excelling as the revs climb to its over-15,000 rpm redline for exceptional sport or track riding.
• Aluminum die-cast cylinder has an open-deck design to surround the upper part of the cylinders with coolant for excellent heat dissipation. Chrome composite plated cylinder bores help reduce mechanical loss and add durability.
• Wide 57mm cylinder bore allows large 22.1mm intake and 19.0mm exhaust valves for greater air flow, while the short 39mm stroke helps produce high-rpm performance.
• Light flywheel with a low moment of inertia helps the engine rev quickly.
• Connecting rod ratio selected to help reduce mechanical loss and vibration, and the rods are case hardened for increased durability.
• Lightweight cast aluminum pistons contribute to low reciprocating weight for quick-climbing revs, and the skirts have a molybdenum coating for increased durability.
• Piston crown design and precision-machined combustion chamber helps achieve an optimized 12.4:1 compression ratio for high performance using pump gasoline.
• Very narrow 24.8-degree valve angle contributes to combustion efficiency and a more compact engine design.
• Like the Ninja ZX-10R, the intake ports have two-stage machining, first along with the valve seats and then again at an inclined angle, to create a straighter and wider intake path for smoother airflow and greater intake volume that contributes to higher performance.
• Lightweight forged camshafts and triple-rate valve springs contribute to high-rpm performance.
• 34mm Electronic Throttle Valves (ETV) help provide smooth engine response and facilitate the use of several of Kawasaki’s electronic rider support systems, which are controlled by a high-spec electronic control unit (ECU) that uses the same platform as that of the supercharged Z H2 motorcycle.
Ram Air Induction
• Centrally-positioned Ram Air duct maintains the Ninja ZX lineage and improves intake efficiency by helping to pressurize the cooler air ingested from the front of the cowling, resulting in increased engine performance.
• Dual-length intake funnels contribute to efficient airflow, help flatten the torque curve and helps smooth power delivery.
• Downdraft intake tract provides a shorter, more direct path for air to enter the cylinder for better filling efficiency and increased engine power, especially at high rpm.
Exhaust
• Header joint pipes linking headers 1-2 and 3-4 help boost low-to-mid-range torque
• Traditionally styled long muffler has the clear, racy exhaust note that’s synonymous with a high performance Kawasaki inline four-cylinder engine.
Six-Speed Transmission with Assist & Slipper Clutch
• Smooth shifting transmission has idealized ratios to help maintain momentum when accelerating out of corners with sport or track riding.
• Using the rotational forces of the clutch hub and pressure plate, the clutch is forced together during acceleration (Assist function) so that fewer and
lighter clutch springs can be used for a lighter feel at the lever. During high back-torque, such as when too low of gear is selected, the slipper function allows some clutch slippage to help prevent engine lock-up and stalling, and rear-wheel hop.
• Use of a spring plate assembly in the clutch contributes to smoother clutch engagement and helps minimize clutch vibration (judder) noise.
ELECTRONIC RIDING AIDS
Kawasaki TRaction Control System (KTRC)(KP)
3-mode system covers a wide range of riding conditions, offering either enhanced sport riding or rider assurance by facilitating smooth riding on slippery surfaces.
• Modes 1 and 2 control ignition timing like S-KTRC, which uses complex analysis to predict when traction conditions are about to become unfavorable and act before wheel slippage exceeds the range for optimal traction. Mode 3 has higher sensitivity and controls ignition timing, fuel and air for ultrasmooth operation.
• The system distinguishes between smooth, power front wheel lifts and sudden lift, allowing smooth lift if acceptable acceleration is maintained.
• A switch on the left handlebar switch housing gives the rider the option to turn the system off.
Power Mode
• Allows riders to set power characteristics to suit riding conditions and style. Riders can choose between full power operation or low power, which is approximately 80 percent of full with a milder throttle response.
Integrated Riding Modes:
Sport, Road, Rain, Rider (manual)
All-inclusive modes that link KTRC and Power Mode allow riders to efficiently set traction control, power delivery and suspension character to suit a given riding situation.
Riders can choose from Sport, Road, Rain or a manual setting (Rider). In the manual Rider mode, each of the systems can be set independently.
-Sport: enables riders to enjoy sporty riding.
-Road: offers comfortable riding over a wide range of situations, from city riding to highway cruising and rural roads.
-Rain: offers rider reassurance when riding on a wet road surface.
The riding mode can be changed while riding, using the button at the left side of the handlebar.
RIDING MODE KTRC POWER MODE
Sport 1 F
Road 2 F
Rain 3 L
Rider (manual) 1,2,3 or Off F or L
The Ninja ZX-4R features several of Kawasaki’s latest technological systems including a traction control system dual selectable Power Modes, Integrated Riding Mode, Kawasaki Quick Shifter and ABS.
Kawasaki Quick Shifter (KQS) (RR model only)
– Allows riders to take even greater advantage of the Ninja ZX-4RR’s exhilarating engine character by enabling clutchless shifts.
– To help provide seamless acceleration, the system detects that the shift lever has been actuated and sends a signal to the ECU to cut ignition so that the next gear can be engaged without having to use the clutch.
– For easier deceleration, KQS detects shift lever actuation and automatically controls engine speed to allow riders to downshift without using the clutch.
– KQS does not operate below 2,500 rpm.
CHASSIS
While the Ninja ZX-4R’s light, quick handling is beneficial on the highway, its high-level supersport character really shines when sport or track riding. High-grade suspension and brake components contribute to the superb performance and provide excellent feedback for a confidence-inspiring ride that invites riders to explore all that the Ninja ZX-4RR has to offer.
Trellis Frame
• High-tensile steel trellis frame designed using Kawasaki’s advanced dynamic rigidity analysis combines pipes of various diameter and thickness to provide the required balance of strength and chassis flex.
• Key chassis dimensions – center of gravity position, swingarm pivot position, engine axis positions, caster angle, etc. – were inspired by Kawasaki’s World SBK Ninja ZX-10RR racer for optimum performance.
• The long-style swingarm allowed the bike’s front-rear weight distribution to be set for a balance of nimble handling and composed chassis behavior. The arched design of its right arm delivers the required balance of rigidity and flex, and enables the muffler to be positioned more centrally while
contributing to stylish, sporty looks.
Showa – Big Piston Separate Function Inverted Fork(KP)
• Large-diameter damping piston reduces damping pressure compared to a that in a regular cartridge-type fork of the same size, yet the same damping force is applied. Reduced damping pressure provides smoother fork action, which is especially noticeable at the initial part of the stroke, for a calmer pitch change when decelerating and braking. This helps provide greater chassis stability on corner entry and a more planted feel when braking.
• Suspension settings idealized for rural roads and city riding while maintaining high performance on the track as well.
• The Ninja ZX-4RR models also have adjustable preload.
Wheels/Tires
• Attractive star-pattern five-spoke wheels are light and rigid to benefit handling.
• Dunlop GPR300 radial tires provide high grip in both dry and wet conditions, contribute to the agile handling, add to ride comfort, and their wide sizing not only adds to the performance but to the impressive supersport style.
Ergonomics
• Naturally aggressive riding position is more forward-leaning than that of the Ninja 400, but still relaxed overall, so riders can take full advantage of the Ninja ZX-4R’s sporty handling even during urban riding.
• Slim fuel tank promotes good contact so the rider feels more connected with the bike, while the low top helps the rider tuck in below the windscreen.
• Firm seat facilitates rider weight shift during track riding yet is comfortable enough to allow riders more lengthy time in the saddle for street and sport runs.
• Aluminum footpegs provide direct feel to further connect he rider with the bike.
• Five-position adjustable brake and clutch levers allow riders set lever reach to hand size and preference.
Horizontal Back-link Rear Suspension(KP)
• The Horizontal Back-link rear suspension positions the shock unit and linkage above the swingarm, where minimal effect from engine and exhaust heat helps maintain stable damping performance.
• The rear shock settings help provide a firm, planted feel that is reassuring during sport riding, while also offering ample absorption for good ride comfort when riding in town.
High-Performance Supersport Brakes
• Dual 290mm semi-floating front discs gripped by fourpiston, radial-mount monobloc calipers with differentiated diameter pistons (30mm lower, 32mm upper) provide strong stopping power.
• The monobloc calipers help provide a firm initial brake touch at the lever, while the brake pad spec contributes to both brake force and controllability.
• A 220mm rear disc with 38mm piston caliper slows the rear wheel.
• Nissin motorcycle-specific ABS control unit provides precise ABS control and is the most compact and lightweight unit available.
Styling
• Aggressive Ninja motorcycle styling exudes a fierce aura of restrained power and explosive action.
• Kawasaki Ninja motorcycle distinctive centrally located Ram Air intake duct, sharp chin spoiler and twin LED headlight position contribute to the strong Kawasaki Ninja model family image.
• Low fuel tank and tight-fitting bodywork with sharplyangled lines contribute to a condensed, high-class appearance.
• LED front turn signals are built into the fairing edges, while the side air ducts direct cool air into the engine room and promote the dissipation of engine heat.
• Slim, upswept race-inspired tail cowl contributes to the aggressive image and houses a Ninja ZX-10R style LED taillight.
Color TFT Instrumentation
• High-grade full color display features TFT (thin-film transistor) technology, delivering a high level of visibility. The screen’s background color is selectable in black or white, and screen brightness adjusts automatically to suit available light.
• Display functions include: digital speedometer, digital bar-style tachometer, gear position indicator, shift indicator (tachometer flashes), fuel gauge, odometer, dual trip meters, current and average fuel consumption, remaining range, average speed, riding time, coolant temperature, clock, battery voltage, lap timer (Circuit Mode only), Kawasaki service reminder, oil change reminder, integrated Riding Mode, KTRC, and Power Mode indicators, smartphone call and mail notices, Bluetooth indicator, Economical Riding Indicator and KQS indicator.
• In addition to scrollable multi-function windows, two display modes offer riders a choice of how they want their information presented.
– Type 1: Designed for ordinary use with an easy-to-read, calm layout offers a substantial amount of information at-a-glance.
– Type 2: Designed with circuit riding in mind, important information like tachometer, current and best lap times, and gear position is prioritized and presented graphically for easy digestion.
RIDEOLOGY THE APP Smartphone Connectivity†
* † Do not operate smartphone while riding
• A Bluetooth chip built into the instrument panel enables riders to connect to their motorcycle wirelessly. Using the smartphone application “RIDEOLOGY THE APP,” a number of instrument functions can be accessed, contributing to an enhanced motorcycling experience.
Available functions:
– Vehicle Info: information such as fuel gauge, odometer, maintenance schedule, etc. can be viewed via the smartphone.
– Riding Log: GPS route information as well as vehicle running information can be logged and viewed via the smartphone.
– Telephone notices: when a call or mail is received by the smartphone, this is indicated on the instrument display.
– Vehicle Settings: Riding Mode (Road, Sport, Rain, Rider) can be set in advance on the smartphone and uploaded when paired with the bike, as can riding support systems (like KQS) and the payload mode.
– General Settings: general instrument display settings (such as preferred units, date, date format, etc.) can be adjusted via the smartphone.
– Vehicle Settings: Riding Mode (Road, Sport, Rain, Rider) can be set in advance on the smartphone and uploaded when in proximity of the bike, as can riding support systems (like KQS) and the payload mode. Once vehicle information has been downloaded to the app, it can be viewed on the smartphone.
• Once vehicle information has been downloaded to the app, it can be viewed on the smartphone Available information includes: odometer, trip A, trip B, fuel gauge, remaining range, average gas mileage, average speed, max lean angle (right/left), battery voltage, Kawasaki service reminder, oil change reminder, etc.
• Detailed riding logs including GPS information and vehicle running information can be recorded. While riding, the app tracks vehicle speed, rpm, gear position, throttle position, front brake fluid pressure, acceleration/deceleration, current mileage, and coolant temperature from moment to moment. Once the riding log has been saved, riders can review these items in a graphic-style display at any point along the route. The app can also display a ride summary, with information that may include: route travelled, total distance, total time, gas mileage (best/average), speed (best/average), max lean angle (right/left), etc. For either display mode, riders can select which items are displayed, and can arrange them in their preferred order.
• When riding with the app ON† the bike and smartphone are always connected. When the engine is turned off, the latest riding information stored by the app may be viewed on the smartphone. Any vehicle setting changes made via the app while the engine is off, or while out of range, cannot be uploaded until the ignition is turned on and the smartphone is in range with the app ON. General settings can only be updated via the app when the bike and smartphone are connected.
* †While RIDEOLOGY THE APP needs to be ON (running in the background) to be connected to the bike, it was not intended to be operated while riding. Rider interaction with the app should be limited to when the vehicle is not being operated and it is safe to do so.
• LED front turn signals are built into the fairing edges, while the side air ducts direct cool air into the engine room and promote the dissipation of engine heat.
• Slim, upswept race-inspired tail cowl contributes to the aggressive image and houses a Ninja ZX-10R style LED taillight.
• Detailed riding logs including GPS information and vehicle running information can be recorded. While riding, the app tracks vehicle speed, rpm, gear position, throttle position, front brake fluid pressure, acceleration/deceleration, current mileage, and coolant temperature from moment to moment. Once the riding log has been saved, riders can review these items in a graphic-style display at any point along the route. The app can also display a ride summary, with information that may include: route travelled, total distance, total time, gas mileage (best/average), speed (best/average), max lean angle (right/left), etc. For either display mode, riders can select which items are displayed, and can arrange them in their preferred order.
• When riding with the app ON† the bike and smartphone are always connected. When the engine is turned off, the latest riding information stored by the app may be viewed on the smartphone. Any vehicle setting changes made via the app while the engine is off, or while out of range, cannot be uploaded until the ignition is turned on and the smartphone is in range with the app ON. General settings can only be updated via the app when the bike and smartphone are connected.
* * †While RIDEOLOGY THE APP needs to be ON (running in the background) to be connected to the bike, it was not intended to be operated while riding.
* Rider interaction with the app should be limited to when the vehicle is not being operated and it is safe to do so.
2025 Kawasaki Ninja ZX-4RR ABS – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $9699 USD
Canada MSRP Price: $ 11,199 CDN
Europe/UK MSRP Price: £ TBD GBP (On The Road inc 20% Vat)
POWER
| POWER | |
| Engine | 4-stroke, in-line 4-cylinder, DOHC, 16-valve, liquid-cooled |
| Displacement | 399cc |
| Bore x Stroke | 57.0 x 39.1mm |
| Compression Ratio | 12.3:1 |
| Maximum Torque | 26.5 lb-ft @ 11,000 rpm |
| Fuel System | DFI® with 34mm throttle valves (4) |
| Ignition | TCBI with Digital Advance |
| Transmission | 6-speed, return shift |
| Final Drive | Chain |
| Electronic Rider Aids | Economical Riding Indicator, Kawasaki TRaction Control (KTRC) (3-mode), Kawasaki Quick Shifter (KQS) (dual direction), Power Modes, Anti-lock Brake System (ABS) |
PERFORMANCE
| PERFORMANCE | |
| Front Suspension / Wheel Travel | 37mm inverted Showa fork with SFF-BP internals and spring preload adjustability/4.7 in |
| Rear Suspension / Wheel Travel | Horizontal back-link, Showa BFRC lite gas-charged shock w/ piggyback reservoir, adjustable compression, rebound and spring preload/4.9 in |
| Front Tire | 110/70-17 |
| Rear Tire | 160/60-17 |
| Front Brakes | Dual 290mm semi-floating discs with radial-mount 4-piston monobloc caliper and ABS |
| Rear Brakes | Single 220mm disc with single-piston caliper and ABS |
DETAILS
| DETAILS | |
| Frame Type | Trellis, high-tensile steel |
| Rake/Trail | 23.5°/3.8 in |
| Overall Length | 78.3 in |
| Overall Width | 30.1 in |
| Overall Height | 43.7 in |
| Ground Clearance | 5.3 in |
| Seat Height | 31.5 in |
| Curb Weight | 414.5 lb* |
| Fuel Capacity | 4.0 gal |
| Wheelbase | 54.3 in |
| Special Features | 4.3″ Full-color TFT Instrumentation, Smartphone Connectivity via RIDEOLOGY THE APP |
| Color Choices | Metallic Matte Whitish Silver/Metallic Flat Spark Black |
2025 Kawasaki Ninja ZX-4RR ABS – Totalmotorcycle.com Canadian Specifications/Technical Details
POWER
| Engine | 399cc, liquid-cooled, 4-stroke, DOHC 16-valve in-line four |
| Bore x Stroke | 57.0 x 39.1 mm |
| Compression Ratio | 12.3:1 |
| Fuel System | Fuel injection: ø34 mm x 4 |
| Ignition | Digital |
| Starting | Electric |
| Lubrication | Forced lubrication, wet sump |
| Transmission | 6-speed, return |
| Clutch | Wet multi-disc, manual |
| Final Drive | Chain |
PERFORMANCE
| Frame | Trellis, high-tensile steel |
| Front Suspension / Wheel Travel | ø37 mm inverted fork (SFF-BP) with spring preload adjustability and top-out springs / 120 mm (4.7 in) |
| Rear Suspension / Wheel Travel | Horizontal Back-link, BFRC lite gas-charged shock with piggyback reservoir, compression and rebound damping and spring preload adjustability, and top-out spring / 124 mm (4.9 in) |
| Rake / Trail | 23.5° / 97 mm |
| Steering Angle (L/R) | 35° / 35° |
| Front Tire | 120/70ZR17M/C (58W) |
| Rear Tire | 160/60ZR17M/C (69W) |
| Front Brakes | Dual semi-floating ø290 mm discs with radial-mount, monobloc, opposed 4-piston calipers |
| Rear Brake | ø220 mm disc with single-piston caliper |
DETAILS
| Dimensions (L x W x H) | 1,990 x 765 x 1,110 mm (78.3 x 30.1 x 43.7 in) |
| Wheelbase | 1,380 mm (54.3 in) |
| Road Clearance | 135 mm (5.3 in) |
| Seat Height | 800 mm (31.5 in) |
| Curb Weight* | 188 kg (414 lb) |
| Fuel Capacity | 15 litres |
| Instrumentation | Full-colour TFT screen with digital speedometer, digital bar-style tachometer, gear position indicator, shift indicator (tachometer flashes), fuel gauge, odometer, dual trip meters, current and average fuel consumption, remaining range, average speed, riding time, coolant temperature, clock, battery voltage, lap timer (Circuit Mode only), Kawasaki service reminder, oil change reminder, integrated Riding Mode, KTRC, and Power Mode indicators, smartphone call and mail notices, Bluetooth indicator, Economical Riding Indicator, and KQS indicator |
| Warranty | 12 months |
| Kawasaki Protection Plus | 12 / 24 / 36 / 48 months |
2025 Kawasaki Ninja ZX-4RR ABS – Totalmotorcycle.com European Specifications/Technical Details
Engine
Engine type
Liquid-cooled, 4-stroke In-Line Four
Displacement
399 cm³
Bore x stroke
57 x 39.1 mm
Compression ratio
12.3:1
Valve system
DOHC, 16 valves
Fuel system
Fuel Injection: Ø 34 mm x 4
Starting System
Electric
Lubrication
Forced lubrication, wet sump
Performance & Transmission
Maximum power
57 kW {77 PS} / 14,500 rpm
Maximum power with RAM air
58.7 kW {80 PS} / 14,500 rpm
CO2 emission
120 g/km
Maximum torque
39 N•m {4 kgf•m} / 13,000 rpm
Transmission
6-speed, return
Final drive
Sealed chain
Primary Reduction Ratio
2.029 (69/34)
Gear Ratios 1st
2.929 (41/14)
Gear Ratios 2nd
2.056 (37/18)
Gear Ratios 3rd
1.619 (34/21)
Gear Ratios 4th
1.333 (32/24)
Gear Ratios 5th
1.154 (30/26)
Gear Ratios 6th
1.037 (28/27)
Final reduction ratio
3.429 (48/14)
Clutch
Wet multi-disc
Brakes & Suspension
Brakes, front
Dual semi-floating ø290 mm discs. Caliper: Dual radial-mount, monobloc, opposed 4-piston
Brakes, rear
Single 220 mm disc. Caliper: Single-piston
Suspension, front
ø37 mm inverted fork (SFF-BP) with spring preload adjustability, and topout springs
Suspension, rear
Horizontal Back-link, BFRC lite gas-charged shock with piggyback reservoir, compression and rebound damping and spring preload adjustability, and top-out spring
Frame & Dimensions
Frame type
Trellis, high-tensile steel
Trail
97 mm
Wheel travel front
120 mm
Wheel travel rear
124 mm
Tyre, front
120/70ZR17M/C (58W)
Tyre, rear
160/60ZR17M/C (69W)
L x W x H
1,990 x 765 x 1,110 mm
Wheelbase
1,380 mm
Ground clearance
135 mm
Fuel capacity
15 litres
Seat height
800 mm
Curb mass
189 kg
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
