Sudden over-application of the brakes, or braking on low-grip surfaces (surfaces with a low coefficient of friction) such as wet asphalt or manhole covers, may cause a motorcycle's wheel(s) to lock up and slip.
Kawasaki's KX™250F was the first mass-production motocrosser to feature Dual Injectors. One injector is located downstream of the throttle valve (where injectors are located on standard FI systems) and a second is locate
Using high-precision electronics for engine management, Kawasaki models can achieve a high level of fuel efficiency. However, fuel consumption is greatly affected by throttle use, gear selection, and other elemen
Electronic Throttle Valves allow the ECU to deliver the ideal amount of fuel and air to the engine.
Horizontal Back-link Rear Suspension arranges its shock unit horizontally, greatly contributing to efficient use of space and mass centralization.
KCMF (Kawasaki Cornering Management Function) oversees multiple engine and chassis electronic management systems to facilitate smooth cornering.
KIBS (Kawasaki Intelligent anti-lock Brake System) is a high-precision brake system designed specifically for supersport models, offering highly efficient braking while maintaining natural feel.
Power Modes allow available power and throttle response to be selected to suit conditions. On the supersport Ninja® ZX™-10R, three modes are available: Full, Low (which limits power to about 60% of Full) and Middle mode,
S-KTRC, Kawasaki's original predictive traction control, uses the same base technology as the Kawasaki works machines that competed in MotoGP, the pinnacle of motorcycle racing. This technology continually controls the
Combined with Kawasaki’s proprietary dynamic modelling program, input from the IMU (Inertial Measurement Unit) enables even more precise chassis orientation awareness, the key to bringing Kawasaki’s electronics to the next level.
KQS (Kawasaki Quick Shifter) enables clutchless up- and downshifts.
In motocross racing, getting a good start is critical. A few tenths of a second can make the difference between getting the holeshot or getting buried in the pack. In slippery conditions, getting the maximum drive from a motocross bike requires
4-stroke, 4 cylinder, DOHC, 4-valve, liquid-cooled
76.0 x 55.0mm
DFI® with 47mm Mikuni throttle bodies (4) with oval sub-throttles, two injectors per cylinder
TCBI with digital advance and Sport-Kawasaki Traction Control (S-KTRC)
6-speed, return shift
43mm inverted Balance Free Fork, adjustable stepless rebound and compression damping, spring preload adjustability/4.7 in
Horizontal back-link with Balance Free gas-charged shock, stepless, dual-range (low-/high-speed) compression damping, stepless rebound damping, fully adjustable spring preload/4.5 in
Kawasaki Launch Control Mode (KLCM), Kawasaki Intelligent anti-lock Brake System (KIBS), Kawasaki Sport Traction Control (S-KTRC), Kawasaki Engine Braking Control, Kawasaki Quick Shifter (KQS) (upshift & downshift), Kawasaki Corner Management Function (KCMF)
12, 24, 36 or 48 months
Intelligent Braking (KIBS), Brembo dual semi-floating 330mm discs with dual radial mounted monobloc 4-piston calipers
KIBS-controlled, single 220mm disc with aluminum single-piston caliper
12 Month Limited Warranty
**Curb weight includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90 percent capacity) and tool kit (if supplied).
Specifications subject to change
KAWASAKI CARES: Always wear a helmet, eye protection, and proper apparel. Never ride under the influence of drugs or alcohol. Read Owner’s Manual and all on-product warnings. Professional rider shown on a closed course. ©2020 Kawasaki Motors Corp., U.S.A.
Sudden over-application of the brakes, or braking on low-grip surfaces (surfaces with a low coefficient of friction) such as wet asphalt or manhole covers, may cause a motorcycle's wheel(s) to lock up and slip. ABS was developed to prevent such incidents. Kawasaki ABS systems are controlled by highly precise and extremely reliable programming formulated thorough testing of numerous riding situations. By ensuring stable braking performance, they offer rider reassurance for even greater riding enjoyment.
To meet the special requirements of certain riders, specialized ABS systems are also available. For example, KIBS (Kawasaki Intelligent anti-lock Brake System) is a precision-tuned brake system designed specifically for supersport models, enabling sport riding to be enjoyed by a wider range of riders. By linking the front and rear brakes, K-ACT (Kawasaki Advanced Coactive-braking Technology) ABS provides the confidence to enjoy touring on heavyweight models. Kawasaki is continually working on the development of other advanced ABS systems.
Kawasaki's KX™250F was the first mass-production motocross bike to feature Dual Injectors. One injector is located downstream of the throttle valve (where injectors are located on standard FI systems) and a second is located upstream of the throttle valve, close to the airbox. The two injectors split their roles: operating at different rpm ranges, they ensure both smooth, instant response at low rpm and high peak power as the revs climb.
For cases that call for low-rpm operation, like immediate acceleration off the start and precise control coming out of corners, primary operation falls to the downstream injector. Because it is positioned close to the combustion chamber, sprayed fuel can be supplied to the engine quickly, resulting in sharp response. Conversely, when high power is the priority, primary operation switches to the upstream injector, which focuses on high-rpm applications. Its location farther away from the combustion chamber means that the fuel has a longer travel time. This allows more time for the fuel particles and air to mix, as well as allowing the mixture to cool and condense. This means that when more power is needed, the cylinder can be filled with a greater quantity of a high-quality mixture.
Using high-precision electronics for engine management, Kawasaki models can achieve a high level of fuel efficiency. However, fuel consumption is greatly affected by throttle use, gear selection, and other elements under the rider's control. The Economical Riding Indicator is a function that signals when current riding conditions are consuming an optimally low amount of fuel. The system continuously monitors fuel consumption, regardless of vehicle speed, engine speed, throttle position and other riding conditions. When fuel consumption is low for a given speed (i.e., fuel efficiency is high), an "ECO" emblem appears on the LCD screen of the instrument panel. By riding so that the "ECO" mark remains on, fuel consumption can be minimized.
While effective vehicle speed and engine speed may vary by model, paying attention to conditions that cause the "ECO" mark to appear can help riders improve their fuel efficiency – a handy way to increase cruising range. Further, keeping fuel consumption low also helps minimize negative impact on the environment.
Kawasaki’s fully electronic throttle actuation system enables the ECU to control the volume of both the fuel (via fuel injectors) and the air (via throttle valves) delivered to the engine. Ideal fuel injection and throttle valve position results in smooth, natural engine response and the ideal engine output. The system also makes a significant contribution to reduced emissions.
Electronic throttle valves also enable more precise control of electronic engine management systems like S-KTRC and KTRC, and allow the implementation of electronic systems like KLCM, Kawasaki Engine Brake Control, and Cruise Control.
When comparing Kawasaki's traditional Uni-Trak® rear suspension, which mounts the shock unit vertically, with Horizontal Back-link rear suspension, the shock unit is almost horizontal. Kawasaki's original suspension arrangement places the shock unit very close to the bike's center of gravity, greatly contributing to mass centralization. And because there is no linkage or shock unit protruding beneath the swingarm, this frees up space for a larger exhaust pre-chamber (an exhaust expansion chamber situated just upstream of the silencer). With a larger pre-chamber, silencer volume can be reduced, and heavy exhaust components can be concentrated closer to the center of the bike, further contributing to mass centralization. The overall result is greatly improved handling.
Another benefit is that the shock unit is placed far away from exhaust heat. Because it is more difficult for exhaust heat to adversely affect suspension oil and gas pressure, suspension performance is more consistent. Horizontal Back-link Rear Suspension offers numerous secondary benefits like this.
Using the latest evolution of Kawasaki’s advanced modeling software and feedback from a compact IMU (Inertial Measurement Unit) that gives an even clearer real-time picture of chassis orientation, KCMF monitors engine and chassis parameters throughout the corner – from entry, through the apex, to corner exit – modulating brake force and engine power to facilitate smooth transition from acceleration to braking and back again, and to assist riders in tracing their intended line through the corner. The systems that KCMF oversees vary by model, but may include:
Kawasaki developed KIBS to take into account the particular handling characteristics of supersport motorcycles, ensuring highly efficient braking with minimal intrusion during aggressive sport riding. It is the first mass-production brake system to link the ABS ECU (Electronic Control Unit) and engine ECU.
In addition to front and rear wheel speed, KIBS monitors hydraulic pressure of the front brake caliper(s), throttle position, engine speed, clutch actuation and gear position. This diverse information is analyzed to determine the ideal hydraulic pressure for the front brake. Through precise control, the large drops in hydraulic pressure seen on standard ABS systems can be avoided. Additionally, the tendency for the rear wheel of supersport models to lift under heavy braking can be suppressed, allowing the rider to maintain control of the rear brake when downshifting.
Power Modes allow available power and throttle response to be selected to suit conditions. On the supersport Ninja® ZX™-10R, three modes are available: Full, Low (which limits power to about 60% of Full) and Middle mode, which falls between the two.
More than a simply bisecting the Full- and Low-mode power curves, in Middle mode, performance characteristics vary depending on engine speed and throttle position. At less than 50% throttle actuation, engine performance is essentially the same as in Low mode. However, opening the throttle past 50% allows performance up to that of Full power to be accessed. This advanced engine management system allows mild engine character for normal riding situations, with the option to tap into greater power for a quick burst of acceleration.
Variable Middle Mode offers riders the ability to alter engine performance and delivery through conscious use of throttle control (either for ease of control when riding in the city, or for greater response when the rider calls for quick acceleration). This kind of technology allows supersport machines to be enjoyed in a broader range of situations.
S-KTRC, Kawasaki's original predictive traction control, uses the same base technology as the Kawasaki works machines that competed in MotoGP, the pinnacle of motorcycle racing. This technology continually controls the rear wheel slip that occurs when power is applied, ensuring optimal acceleration. In general, maximum forward drive requires a certain amount of slip (usually between 20-30% slip ratio, i.e. the rear wheel is turning 20-30% faster than the front). To ensure the most effective transfer of power to the tarmac, S-KTRC monitors the slip ratio in real time, and governs engine power delivery to optimize rear wheel traction.
S-KTRC monitors a number of parameters, including front and rear wheel speed, engine rpm and throttle position. Conditions are confirmed every five milliseconds, at which time the system looks at each of the parameters, as well as their rate of change. This unique Kawasaki method makes it possible to interpolate and predict how the bike will behave in the next instant.
Unlike 1-mode KTRC, which cuts power as soon as rear slip is detected, S-KTRC uses minimal power drops to ensure the slip ratio for optimal traction is maintained. Because its goal is to maximize acceleration, as long as sufficient forward motion is detected, this sport riding system will allow power wheelies as the bike comes out of corners.
The strength of Kawasaki’s cutting-edge electronics has always been the highly sophisticated programming that, using minimal hardware, gives the ECU an accurate real-time picture of what the chassis is doing. Kawasaki’s proprietary dynamic modelling program makes skilful use of the magic formula tyre model as it examines changes in multiple parameters, enabling it to take into account changing road and tyre conditions.
The addition of an IMU (Inertial Measurement Unit) enables inertia along 6 DOF (degrees of freedom) to be monitored. Acceleration along longitudinal, transverse and vertical axes, plus roll rate and pitch rate are measured. The yaw rate is calculated by the ECU. This additional feedback contributes to an even clearer real-time picture of chassis orientation, enabling even more precise management for control at the limit.
With the addition of the IMU and the latest evolution of Kawasaki’s advanced modelling software, Kawasaki’s electronic engine and chassis management technology takes the step to the next level – changing from setting-type and reaction-type systems to feedback-type systems – to deliver even greater levels of riding excitement.
Designed to help riders maximise their acceleration on the circuit by enabling clutchless upshifts with the throttle fully open, KQS 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. Depending on ECU settings (or when a race kit ECU is used), clutchless downshifts are also possible.
In motocross racing, getting a good start is critical. A few tenths of a second can make the difference between getting the holeshot or getting buried in the pack. In slippery conditions, getting the maximum drive from a motocross bike requires precise control of both the clutch and throttle.
Launch Control Mode helps riders get out of the gate quickly by complementing high-level technique with engine management. Featured on a mass-production motocross bike for the first time on Kawasaki's KX™450F, the system activates a separate engine map designed to get a more efficient start off the line. The system is designed to the same specifications as that used by Kawasaki Factory racers competing in the AMA Supercross and Pro Motocross championships.
Launch Control Mode is activated simply by pressing a button on the handlebar. The Launch Control map slightly slows down the ignition timing to help tame the engine's strong torque and reduce wheel-spin off the start. Launch Control Mode is only active in the first two gears off the start, disengaging and returning to the standard engine map automatically once the rider shifts into third gear. The system gives riders a great advantage out of the gate and puts them in a better position to control the race.