The NINJA ZX-6R motorcycle provides Supersport Obsession with superb real-world riding exhilaration while tapping into its racing bloodline with bodywork that closely resembles its Superbike World Championship winning Ninja ZX-10R.
Review – Key Features – Features & Benefits – Specifications
2025 Kawasaki Ninja ZX-6R: PUSH THE BOUNDRIES WITHOUT ABS.
Introducing the 2025 Kawasaki Ninja ZX-6R…
Nimble handling is achieved on the Ninja ZX-6R thanks to its race-derived chassis that allows the rider to become one with the machine whether on the racetrack, navigating canyon roads, or cruising city streets. A Showa SFF-BP (Separate Function Fork – Big Piston) and fully adjustable Showa rear shock offer a high level of performance for the racetrack and the plush feeling desired when riding in town. Dual 310mm front discs ensure excellent stopping power, while Pirelli Diablo Rosso IV tires offer excellent grip in a variety of riding conditions. The styling is inspired by the Ninja ZX-10R, yet retains its own distinct supersport identity. Its smooth, flowing styling was designed to turn heads and capture hearts. Compact LED headlights, an intricately layered front cowl, and a sporty windshield bring a face to one of the most feared models in Kawasaki’s supersport lineup.
The NINJA ZX-6R motorcycle provides Supersport Obsession with superb real-world riding exhilaration while tapping into its racing bloodline with bodywork that closely resembles its Superbike World Championship winning Ninja ZX-10R. While its looks are sure to turn heads, the Ninja ZX-6R is still loaded with many high technology features to help a wider range of riders to enjoy this machine’s serious sport riding performance on the circuit or the street.
The Kawasaki Ninja ZX-6R “636” remains a staple in the Ninja ZX supersport lineup and pushes the boundaries with track-ready performance that prioritizes confident handling during high-performance sport riding. The Ninja ZX-6R offers superior performance across the rev range with its potent 636cc liquid-cooled in-line four-cylinder engine and Assist & Slipper Clutch. It also boasts an eye-catching list of technology features that includes KQS, Kawasaki TRaction Control (KTRC) with three performance settings, KIBS, Power Modes, 4.3” TFT color instrumentation, Smartphone Connectivity via RIDEOLOGY THE APP*, and Integrated Riding Modes.
2025 Kawasaki Ninja ZX-6R Totalmotorcycle.com Key Features
Experience Supersport Obsession with the Ninja ZX-6R motorcycle. Push all boundaries with unrivaled performance that prioritizes control during high-performance sport riding. To us, the ability to inspire full confidence and clarity when needed most is the highest exhilaration.
- 636cc IN-LINE 4-CYLINDER DOHC ENGINE
- KAWASAKI QUICK SHIFTER (KQS)
- SELECTABLE POWER MODES COMBINED WITH KAWASAKI TRACTION CONTROL (KTRC)
- SHOWA SEPARATE FUNCTION FORK BIG PISTON (SFF-BP), FULLY-ADJUSTABLE
- SMARTPHONE CONNECTIVITY VIA RIDEOLOGY THE APP
- DUAL 310mm FRONT DISCS WITH DUAL RADIAL-MOUNTED 4-PISTON MONOBLOC CALIPERS
- LARGE-DISPLACEMENT 636CC ENGINE PROVIDES MORE USEABLE POWER AND TORQUE
- ADVANCED KAWASAKI TRACTION CONTROL (KTRC) FOR ENHANCED PERFORMANCE
- POWER MODE ALLOWS QUICK ADJUSTMENT FOR RIDER PREFERENCE AND CONDITIONS
- SHOWA BIG PISTON SEPARATE FUNCTION FORK FOR SUPERB RIDE ON ROAD AND TRACK
- Distinct Ninja® Styling
- TFT Color Instrumentation with smartphone connectivity
- All-LED lighting
- Pressed-aluminum perimeter frame
- Pirelli Diablo™ Rosso IV tires
POWER
FLEX ON THE STREET & TRACK
Powered by a potent 636cc engine and advanced performance technology, the Ninja ZX-6R supersport motorcycle delivers legendary Ninja power on and off the track.
THE 636 ADVANTAGE
The advantage offered by the Ninja ZX-6R supersport motorcycle’s 37cc greater engine displacement is significant for real-world riding exhilaration. Greater performance across the rpm range is welcome when sport riding, both on canyon roads and on the racetrack. But stronger low- and mid-range torque compared to “ordinary” mid-size supersport models also offers increased usability in everyday street riding situations.
KEEP THE MOMENTUM
A high-quality Assist & Slipper clutch reduces back-torque when excessive engine braking occurs to help maintain a high speed through turns in order to enter the next straight-away with optimal momentum.
KAWASAKI QUICK SHIFTER
This highly reliable contactless-type quick shifter enables ultra-quick upshifts at full power for seamless, maximum acceleration on or off the track. When the shift lever has been activated, the system sends a signal to the ECU to momentarily cut ignition so that the next gear can be engaged for clutchless shifting.
PRECISION PERFECTED
The Ninja ZX-6R motorcycle gets ahead of sharp turns with optimized engine performance across the entire rpm range, class-leading components, and advanced rider support technology.
SUPERIOR BRAKING PERFORMANCE
Highly rigid, radial-mount monobloc calipers deliver a firm feel at the lever for superb control. Large, 310mm round disc brakes and a radial-pump front brake master cylinder complete the front brake package, ensuring powerful braking with excellent feel. A 220mm round disc brake and lightweight caliper slow the rear wheel.
GRIP & CONQUER
With Pirelli Diablo Rosso IV tires, experience unmatched confidence, lighter handling and, ultimately, more thrills when you take command of sharp turns, thanks to superior grip in a variety of conditions.
CONFORM TO THE ROAD
Fully adjustable Uni-Trak rear suspension with progressive damping helps maintain rear wheel traction while putting power to the ground. This leads to confident braking and predictable handling both on and off the track.
BEAUTIFULLY AGGRESSIVE
The Ninja ZX-6R supersport motorcycle features smooth-flowing supersport styling with 3D interwoven bodywork.
DISRUPTIVE DESIGN
Distinct front and side cowls, sporty windscreen, and all-LED lighting create the recognizable Ninja look.
LIGHT UP THE RIDE
Hybrid projector/reflector headlights, featuring mono-focused LED technology, are supplemented by LED turn signals and deep-set reflectors.
CLEAN DESIGN
The blacked out engine covers and muffler body add to the sporty look of the Ninja ZX-6R supersport bike.
HIGH-TECH SUPERSPORT
Race DNA and advanced technology is what the Ninja family is known for. So it comes as no surprise that the Ninja ZX-6R supersport bike features the advanced technology and performance you expect from a Ninja.
INTEGRATED RIDING MODES
The Ninja ZX-6R supersport motorcycle features 4 integrated riding modes (Sport, Road, Rain, or Manual) that allow the rider to select the level of traction control and power to suit the current riding conditions.
TFT COLOR INSTRUMENTATION
The 4.3-in all-digital TFT color instrumentation with smartphone connectivity gives the rider important information at a glance, as well as the convenience and safety of a hands-free smartphone connection.
KAWASAKI TRACTION CONTROL (KTRC)
The Ninja ZX-6R supersport bike features Kawasaki TRaction Control (KTRC), which provides 3 levels of assistance to cover a wide range of riding conditions, ranging from enhanced sport riding to helping manage low-traction surfaces.
POWER MODE SELECTION
The Ninja ZX-6R supersport bike allows riders to choose from Full Power or Low Power mode to suit the riding situation.
2025 KAWASAKI NINJA SUPERSPORT AND SPORT MOTORCYCLE LINEUP
Kawasaki proudly announces the return of select 2025 Ninja motorcycles to the streets and race circuits. Among the lineup, making a triumphant return are the acclaimed Kawasaki Ninja ZX supersport models, including the Ninja ZX-10R, Ninja ZX-10RR, Ninja ZX-6R, and the sport-derived Ninja 650.
For enthusiasts and adrenaline seekers alike, these iconic bikes symbolize the perfect fusion of cutting-edge technology and heart-pounding performance, promising an unrivaled experience on both the road and track. Each bike in this lineup embodies the spirit of speed, innovation, and uncompromising performance.
2025 Kawasaki Ninja ZX-6R Totalmotorcycle.com Features and Benefits
636cc Ultra-Compact, Low-Friction Engine
• Long stroke engine offers increased performance over many other 600 class engines at all rpm, and especially in the low-to-mid-range for
better rideability on city streets.
• All internal parts are designed to be strong yet small with ideal dimensional accuracy to reduce power-robbing friction.
• Close cylinder pitch and compact crankcases result in a small, rigid engine. This compact engine also contributes significantly to the overall slim and compact chassis.
• Short-skirt forged pistons, light piston pins and a compact connecting rod small end help reduce reciprocating weight for quick revs.
Mass Centralization
• Tri-axis crankshaft and transmission shaft layout concentrates engine mass to idealize the engine’s center of gravity. This helps reduce pitching movement during braking to give the rider better chassis feedback. By reducing the amount of front/rear weight transfer, the loads on the suspension and tires are reduced, providing more freedom when adjusting suspension settings.
• Exhaust pre-chamber located beneath the engine helps centralize mass and allows the use of a smaller, lighter muffler.
ENGINE
Ram Air Induction(KP)
• High-Volume airbox contributes to increased peak power and smooth power delivery.
• Long intake funnels help boost low-to-mid-range performance and power feeling.
• Ram air duct is rigid and supports the instrument panel and mirror stays to eliminate brackets and reduce weight.
• Central ram air duct produces a straight path to the airbox which reduces turbulence and increases pressure for maximum intake efficiency.
Digital Fuel Injection(KP)
• Long throttle bodies increase the distance between the main and sub throttle valves for better throttle response.
• 38mm Keihin throttle bodies with dual-throttle valves(KP) provide optimum performance and rideability. The sub-throttles, located before the main throttle valves in the throttle bore, are controlled by the ECU so that the DFI system has more precise throttle response, similar to a constant velocity carburetor.
• Fine atomizing fuel injectors have increased volume and a revised spray pattern to optimize mixing with air for the increased displacement.
Stainless Steel Exhaust
• All four stainless steel header pipes are connected by joint pipes for increased low-to-mid-range torque.
• Exhaust system helps boost low-end and mid-range power without sacrificing top-end. A pre-chamber under the engine centralizes weight, reduces exhaust noise and helps minimize muffler volume.
• Single right-side muffler lowers the overall center of gravity and helps centralize mass. Triangular design provides correct volume to meet noise standards while allowing good lean angle and compact appearance.
• Short fuel pump with flat-bottom design prevents fuel warming in the bottom of the pump. Cooler fuel provides better combustion efficiency.
• A butterfly valve located at the entrance to the muffler is controlled by the ECU using rpm, throttle position and gear position to improve low-end response and help smooth overall power. Optimum exhaust tuning is attained at all engine speeds to prevent blowback that can occur with high overlapping valve timing. The valve also quiets the exhaust so a smaller, lighter muffler can be used.
ADVANCED ELECTRONIC RIDING AIDS
Cassette Transmission
• Final drive ratio emphasizes the engine’s strong low-end power.
• Short first gear ratio makes it easy to move away from a stop.
• 6-speed close-ratio transmission is removable as a cassette, providing quick access for making gearing changes.
• Gear position sensor is also linked to the dash to provide instant information to the rider. The system is also compatible with semiautomatic,
electronic shifters used by racers to facilitate clutchless shifting and help lower lap times.
Kawasaki Quick Shifter (KQS)
• Contact-less potentiometer-type quick shifter that enables quick upshifts for 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 using the clutch. (Clutch use recommended for downshifts.)
FCC Assist & Slipper Clutch(KP)
• 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.
The Ninja ZX-6R features several of Kawasaki’s latest technological systems. Its traction control system is the same as found on the flagship Ninja ZX-14R. Combined with two selectable Power Modes, this offers riders eight combinations covering a wide range of riding situations.
Kawasaki Traction Control System (KTRC)(KP)
• 3-mode system combines the best features of Sport-KTRC from the Ninja ZX-10R and KTRC from the Concours 14 to help provide maximum traction with some degree of slippage for sport riding and 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 ultra-smooth 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 S-KTRC and Power Mode allow riders to efficiently set traction control and power delivery 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 circuit riding, or sporty riding on back roads.
– Road: covers a wide range of situations, from city riding to highway cruising and rural roads.
– Rain: offers rider reassurance when riding on a low traction surface.
Riding Mode KTRC Power Mode
Sport 1 F
Road 2 F
Rain (manual) 3 L
Rider (manual) 1/2/3/OFF F/L
• The riding mode can be changed while riding, using the button on the left handlebar.
CHASSIS
Rider-Responsive Chassis
• Designed in conjunction with the suspension to provide a controlled, comfortable ride on streets and highways while allowing high cornering prowess for quick lap times on the track.
• The frame and swingarm were developed with an ideal stiffness balance, so the Ninja ZX-6R responds instantly and precisely to the rider’s commands and provides excellent rider feedback.
Aluminum Perimeter Frame(KP)
• Stiffness balance designed for superb handling. Frame rigidity is optimized to help prevent road or track irregularities from upsetting the chassis. Working with the suspension, the frame helps provide a more planted ride and helps absorb impacts without upsetting handling.
• Steep 23.5˚ degree rake angle for sharp handling and more feedback from the front tire.
• Engine mount angle designed for precise turning and less effort leaning into a turn.
• Engine mounting position at the rear of the cylinder head also compliments the frame’s stiffness balance.
Combination of pressed and cast aluminum components are welded to form the perimeter type frame. By combining cast and pressed pieces frame weight is kept to a minimum while still providing high strength and stability with responsive handling.
• Two-piece die-cast aluminum sub-frame is light and narrow.
SUSPENSION
Showa – Big Piston Separate Function Inverted Fork(KP)
• With springs in both legs, preload and damping functions are separated into the right and left fork tubes. Preload adjustment is made on the left side, compression and rebound damping on the right. All adjustment screws are at the top of the forks for easy access.
• 37mm pistons produce high damping force for improved performance during heavy braking.
• Suspension settings idealized for winding roads and city riding while maintaining high performance on the track as well.
Uni-Trak Rear Suspension(KP)
• Uni-Trak lever ratios and shock damping settings offer a plush ride on the street and highway.
• Cast aluminum swingarm has a perfect balance of stiffness and flex and works with the frame’s stiffness balance to provide exceptional handling.
• Showa rear shock features preload, compression and rebound damping adjustments as well as adjustable ride height.(KP)
High Performance Brake System
• Radial mounted Nissin monobloc front brake calipers utilize integrated mounting points at both the top and bottom of each caliper, which makes the caliper more rigid for excellent brake feel and performance.
• Monobloc caliper is machined from a single aluminum block that contributes to superb feel, increased heat dissipation and lighter weight.
• 310mm front discs provide strong braking performance.
• Radial pump front master cylinder provides excellent front brake feel and performance.
• Nissin rear brake caliper with 30mm piston from the Ninja ZX-10R is light, resists fade and offers good control.
STYLING
Ninja Styling
• Compact hybrid projector/reflector headlights help define the Ninja ZX-6R’s face. The low beams are compact projector lamps with mono-focus LED technology, while the high beams and position lamps are reflector-type. The deep-set position of the reflectors in the unlit portions of the headlights makes them appear dark to enhance the fierce expression. Black extensions between the low and high beams contribute to the
overall fierce, blacked-out image.
• Intricately layered front cowl design is complemented by winglet-style inlets and angled chin spoilers to form a highlydistinctive image. The inlets help keep wind off the rider, while the chin spoilers help create downforce when cornering.
• The area around the central Ram-Air intake is painted to coordinate with the cowl for a sharp image.
• Short windscreen is supported on each side by the front cowl to help stabilize the windscreen at higher speeds. Openings at the side of the windscreen relieve pressure build-up behind it to help reduce buffeting on the rider.
• The front and side inner cowls use interwoven layers to create a 3-D effect with the multiple layers contrasting with the smooth outer
and lower cowls, adding to the design.
• An LED taillight inspired by the Ninja ZX-10R adds a sophisticated look when the bike is seen from the rear.
• Heel guards contribute to the bike’s dynamic lines.
• Blacked-out engine covers and muffler with buffed end cap contribute to the supersport image.
Ergonomics
• The seat complements the tail section and allows the rider to make easy contact with the rear seat step, which contributes feedback from the chassis.
• The seat narrows at the front, contributing to the slim riding position and making it easier for the rider’s feet to reach the pavement.
• Five-position adjustable clutch lever allows riders to tailor the lever position to suit their hand size.
TFT Color Instrumentation
4.3-inch all-digital instrumentation helps give the cockpit a high-tech, high-grade appearance.
• 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 lamp, odometer, dual trip meters, current and average fuel consumption, remaining range, average speed, total time, coolant temperature, clock, battery voltage, Kawasaki service reminder, oil change reminder, call/mail reminders, Bluetooth indicator, and Economical Riding Indicator.
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.
• 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.
2025 Kawasaki Ninja ZX-6R – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $11,399 USD
Canada MSRP Price: $ TBA CDN
Europe/UK MSRP Price: £ NA GBP (On The Road inc 20% Vat)
Engine Type 4-Stroke, Liquid-Cooled, DOHC, 4 Valve Cylinder Head, Transverse In-Line 4-Cylinder
Displacement 636cc
Bore & Stroke 67.0 x 45.1mm
Maximum Torque 52.1 lb-ft @ 11,500 rpm
Compression Ratio 12.9:1
Fuel Injection DFI with Keihin 38mm Throttle Bodies (4)
Ignition TCBI with Digital Advance
Transmission 6-Speed with Positive Neutral Finder, Kawasaki quick shifter (up shift only)
Final Drive Sealed Chain
Rake/Trail 24.5.°/4.1 in.
Front Wheel Travel 4.7 in.
Rear Wheel Travel 5.9 in.
Front Tire Size 120/70-ZR17
Rear Tire Size 180/55-ZR17
Wheelbase 55.1 in.
Front Suspension Big Piston SFF-Style 41mm Inverted Cartridge-Type Fork w/ Adjustable
Preload, Stepless Compression and Rebound Damping
Rear Suspension Uni-Trak with Adjustable Preload,
25-Way Rebound Stepless High and Low Speed
Compression Damping Adjustment and Adjustable Ride Height
Front Brake Type Dual 310mm Petal Discs with
Radial Mount, Opposed 4-Piston Calipers
Rear Brake Type Single 210mm Petal Disc
Fuel Tank Capacity 4.5 gal.
Seat Height 32.7 in.
Curb Weight= 425.6, 430 (ABS) lb.
Warranty 12 months
Kawasaki Protection Plus 12, 24, 36 or 48 months
(Specifications subject to change without notice.)
= Includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90% of capacity) and tool kit (if supplied).
When equipped, 50-state models with evaporative emissions equipment adds approximately 2.2 pounds.
(KP) = See Kaw-Pedia section for more details.
* = Changes from previous model year.
** = Also available as a 50-state model with the last character ending in “L”
2025 Kawasaki Ninja ZX-6R – Totalmotorcycle.com Canadian Specifications/Technical Details
NA
2025 Kawasaki Ninja ZX-6R – Totalmotorcycle.com European Specifications/Technical Details
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).
