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2023 is a landmark year for the Kawasaki as it denotes 50 glorious years of the world famous KX brand. To celebrate, the distinctive Lime Green KX450 and KX250 will available as 50th Anniversary Editions at Kawasaki off-road dealers as part of the 2024 off-road range.
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All-new KX450-style bodywork features long, smooth surfaces and a flatter tank-seat line designed to facilitate rider movement and control.
All-new KX450-style bodywork features long, smooth surfaces and a flatter tank-seat line designed to facilitate rider movement and control.
Additional engine updates increase peak power of the already powerful engine by approximately 1.0 kW (1.4 PS). Rev limit increases a further 350 min-1.
Additional engine updates increase peak power of the already powerful engine by approximately 1.0 kW (1.4 PS). Rev limit increases a further 350 min-1.
Electric start makes restarting the engine as easy as pushing a button.
Updated suspension settings contribute to increased bump absorption and traction, while minor brake component revisions enhance controllability.
Updated suspension settings contribute to increased bump absorption and traction, while minor brake component revisions enhance controllability.
Like the KX450, a hydraulic clutch offers more direct feel and lighter lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
Like the KX450, a hydraulic clutch offers more direct feel and lighter lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
KX450-based frame (an evolution of the current design) and KX450 swingarm offer improved handling and increased rear wheel traction.
KX450-based frame (an evolution of the current design) and KX450 swingarm offer improved handling and increased rear wheel traction.
Factory-style Ø 28.6 mm Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature. The thicker handlebar helps reduce vibration and shocks transmitted to the rider, while the new grip position (19 mm lower, 8 mm closer) helps put the rider in a position that makes it easier to weight the front wheel.
Factory-style Ø 28.6 mm Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature. The thicker handlebar helps reduce vibration and shocks transmitted to the rider, while the new grip position (19 mm lower, 8 mm closer) helps put the rider in a position that makes it easier to weight the front wheel.
All-new KX450-style bodywork features long, smooth surfaces and a flatter tank-seat line designed to facilitate rider movement and control.
All-new KX450-style bodywork features long, smooth surfaces and a flatter tank-seat line designed to facilitate rider movement and control.
Additional engine updates increase peak power of the already powerful engine by approximately 1.0 kW (1.4 PS). Rev limit increases a further 350 min-1.
Additional engine updates increase peak power of the already powerful engine by approximately 1.0 kW (1.4 PS). Rev limit increases a further 350 min-1.
Electric start makes restarting the engine as easy as pushing a button.
Updated suspension settings contribute to increased bump absorption and traction, while minor brake component revisions enhance controllability.
Updated suspension settings contribute to increased bump absorption and traction, while minor brake component revisions enhance controllability.
Like the KX450, a hydraulic clutch offers more direct feel and lighter lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
Like the KX450, a hydraulic clutch offers more direct feel and lighter lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
KX450-based frame (an evolution of the current design) and KX450 swingarm offer improved handling and increased rear wheel traction.
KX450-based frame (an evolution of the current design) and KX450 swingarm offer improved handling and increased rear wheel traction.
Factory-style Ø 28.6 mm Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature. The thicker handlebar helps reduce vibration and shocks transmitted to the rider, while the new grip position (19 mm lower, 8 mm closer) helps put the rider in a position that makes it easier to weight the front wheel.
Factory-style Ø 28.6 mm Renthal aluminium Fatbar, a popular aftermarket part, is now a standard feature. The thicker handlebar helps reduce vibration and shocks transmitted to the rider, while the new grip position (19 mm lower, 8 mm closer) helps put the rider in a position that makes it easier to weight the front wheel.
Launch Control Mode is a motocross-use start mode that helps riders get the holeshot by minimising wheel spin off the start.
In motocross racing, getting a good start is critical. A few tenths of a second can make the difference between getting the holeshot or not. In slippery conditions, getting the maximum drive from a motocrosser requires precise control of the both the clutch and throttle. Launch Control Mode helps riders get a good start by complementing high-level technique with engine management. Featured on a mass-production motocrosser for the first time on Kawasaki's KX450F, 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 our factory racers competing in the AMA Supercross and Motocross championships. Launch Control Mode is activated simply by pressing the button on the handlebar. The Launch Control map slightly retards 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 3rd gear. The system gives riders a great advantage when lining up at the gate and puts them in a better position to win.
ERGO-FIT is an interface system that allows a wide range of riders to feel at one with their machine.
Proper fit is key for rider comfort and control. However, the ideal fit varies from rider to rider, depending on their physical dimensions and riding style. ERGO-FIT is an interface system designed to allow riders to find their ideal riding position. Various points of the chassis interface (the handlebar, footpegs and seat, etc) can be adjusted through a combination of interchangeable parts and parts with adjustable positions. This enables a wide range of riders to find a riding position that offers both comfort and control. Feeling at one with their machine, they will be able to experience how Kawasaki machines are fun and rewarding to ride. *Adjustable parts and their range of adjustability vary by model.
Dual Injectors, each with a distinct role, operate at different rpm ranges, to deliver both quick response and increased high-rpm power.
Kawasaki's KX250F 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 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 at high-rpm. For cases that call for low-rpm operation like instantaneous acceleration off the start and precise control when cornering, 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 high-quality mixture.
Launch Control Mode is a motocross-use start mode that helps riders get the holeshot by minimising wheel spin off the start.
In motocross racing, getting a good start is critical. A few tenths of a second can make the difference between getting the holeshot or not. In slippery conditions, getting the maximum drive from a motocrosser requires precise control of the both the clutch and throttle. Launch Control Mode helps riders get a good start by complementing high-level technique with engine management. Featured on a mass-production motocrosser for the first time on Kawasaki's KX450F, 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 our factory racers competing in the AMA Supercross and Motocross championships. Launch Control Mode is activated simply by pressing the button on the handlebar. The Launch Control map slightly retards 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 3rd gear. The system gives riders a great advantage when lining up at the gate and puts them in a better position to win.
ERGO-FIT is an interface system that allows a wide range of riders to feel at one with their machine.
Proper fit is key for rider comfort and control. However, the ideal fit varies from rider to rider, depending on their physical dimensions and riding style. ERGO-FIT is an interface system designed to allow riders to find their ideal riding position. Various points of the chassis interface (the handlebar, footpegs and seat, etc) can be adjusted through a combination of interchangeable parts and parts with adjustable positions. This enables a wide range of riders to find a riding position that offers both comfort and control. Feeling at one with their machine, they will be able to experience how Kawasaki machines are fun and rewarding to ride. *Adjustable parts and their range of adjustability vary by model.
Dual Injectors, each with a distinct role, operate at different rpm ranges, to deliver both quick response and increased high-rpm power.
Kawasaki's KX250F 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 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 at high-rpm. For cases that call for low-rpm operation like instantaneous acceleration off the start and precise control when cornering, 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 high-quality mixture.
Engine type | Liquid-cooled, 4-stroke, single-cylinder |
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Compression ratio | 14.1:1 |
Valve system | DOHC, 4 valves |
Bore x stroke | 78.0 x 52.2 mm |
Displacement | 249 cm³ |
Fuel system | Fuel injection: 44 mm x 1 |
Lubrication | Forced lubrication, semi‑dry sump |
Starting system | Electric |
Ignition system | Digital |
Transmission | 5-speed, return shift |
---|---|
Clutch | Wet, multi disc |
Primary reduction ratio | 3.350 (67/20) |
Gear ratios 1st | 2.077 (27/13) |
Gear ratios 2nd | 1.688 (27/16) |
Gear ratios 3rd | 1.438 (23/16) |
Gear ratios 4th | 1.235 (21/17) |
Gear ratios 5th | 1.045 (23/22) |
Final drive | Chain |
Final reduction ratio | 3.846 (50/13) |
Frame type | Perimeter, aluminium |
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Trail | 118 mm |
Wheel travel front | 314 mm |
Wheel travel rear | 316 mm |
Tyre, front | 80/100-21 51M |
Tyre, rear | 110/90-19 62M |
L x W x H | 2,190 x 820 x 1,270 mm |
Steering angle L/R | 42° / 42° |
Wheel base | 1,485 mm |
Ground clearance | 345 mm |
Fuel capacity | 6.2 litres |
Seat height | 960 mm |
Curb mass | 108 kg |
Front brake type | Single semi-floating petal disc |
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Front brake diameter | Ø 270 mm |
Front brake caliper type | Dual-piston |
Rear brake type | Single petal disc |
Rear brake diameter | Ø 240 mm |
Rear brake caliper type | Single-piston |
Front suspension type | Inverted fork with adjustable compression and rebound damping |
Front suspension diameter | Ø 48 mm |
Rear suspension type | Uni-Trak, adjustable dual-range (high/low-speed) compression and adjustable rebound damping, and spring preload adjustability |
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