Inpage Navigation Section: Overview
Tough terrain won’t stop us from winning. With championship-proven technology and tuning to take on every challenge, the KX450X motorcycle has what it takes to win outdoors. Get the off-road edge by riding the bike built to stay ahead of the rest.
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Inpage Navigation Section: Features & Specs
F21”/R18” wheels and enduro-type tyres are well-suited to the situations encountered in X riding.
F21”/R18” wheels and enduro-type tyres are well-suited to the situations encountered in X riding.
Electric start makes restarting the engine as easy as pushing a button.
KX450 brake package optimised for X riding delivers strong stopping power and a high level of control.
KX450 brake package optimised for X riding delivers strong stopping power and a high level of control.
Adjusting engine settings to suit conditions is simple with the KX-style DFI couplers. Plug-and-play style system is quick, easy and stress-free.
Adjusting engine settings to suit conditions is simple with the KX-style DFI couplers. Plug-and-play style system is quick, easy and stress-free.
The KX FI Calibration Kit features the handheld KX FI Calibration Controller, which enables riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference. This convenient tool can be used without a PC, simply by plugging into the engine’s ECU.
The KX FI Calibration Kit features the handheld KX FI Calibration Controller, which enables riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference. This convenient tool can be used without a PC, simply by plugging into the engine’s ECU.
A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.
A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.
Getting ahead of your rivals early means not having to work your way through the pack later on. Kawasaki’s factory-style Launch Control Mode is standard equipment that gives riders an edge when they line up at the start.
Getting ahead of your rivals early means not having to work your way through the pack later on. Kawasaki’s factory-style Launch Control Mode is standard equipment that gives riders an edge when they line up at the start.
The narrow frame and minimalistic bodywork offer a slim riding position that facilitates control.
The narrow frame and minimalistic bodywork offer a slim riding position that facilitates control.
High-performance suspension comes directly from the KX450. Spring rates and damping settings optimised for the X scene offer increased feedback, especially when riding on aggressive trails.
High-performance suspension comes directly from the KX450. Spring rates and damping settings optimised for the X scene offer increased feedback, especially when riding on aggressive trails.
Well-balanced frame from the KX450 contributes to the KX450X’s light weight, light handling, and slim ergonomics.
Well-balanced frame from the KX450 contributes to the KX450X’s light weight, light handling, and slim ergonomics.
KX factory-style skid plate and a convenient side stand are both standard equipment.
KX factory-style skid plate and a convenient side stand are both standard equipment.
Like the KX450, a hydraulic clutch offers direct feel and light lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
Like the KX450, a hydraulic clutch offers direct feel and light lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
F21”/R18” wheels and enduro-type tyres are well-suited to the situations encountered in X riding.
F21”/R18” wheels and enduro-type tyres are well-suited to the situations encountered in X riding.
Electric start makes restarting the engine as easy as pushing a button.
KX450 brake package optimised for X riding delivers strong stopping power and a high level of control.
KX450 brake package optimised for X riding delivers strong stopping power and a high level of control.
Adjusting engine settings to suit conditions is simple with the KX-style DFI couplers. Plug-and-play style system is quick, easy and stress-free.
Adjusting engine settings to suit conditions is simple with the KX-style DFI couplers. Plug-and-play style system is quick, easy and stress-free.
The KX FI Calibration Kit features the handheld KX FI Calibration Controller, which enables riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference. This convenient tool can be used without a PC, simply by plugging into the engine’s ECU.
The KX FI Calibration Kit features the handheld KX FI Calibration Controller, which enables riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference. This convenient tool can be used without a PC, simply by plugging into the engine’s ECU.
A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.
A choice of four handlebar positions and two footpeg positions allows riders to tailor their riding position to suit body size and preference.
Getting ahead of your rivals early means not having to work your way through the pack later on. Kawasaki’s factory-style Launch Control Mode is standard equipment that gives riders an edge when they line up at the start.
Getting ahead of your rivals early means not having to work your way through the pack later on. Kawasaki’s factory-style Launch Control Mode is standard equipment that gives riders an edge when they line up at the start.
The narrow frame and minimalistic bodywork offer a slim riding position that facilitates control.
The narrow frame and minimalistic bodywork offer a slim riding position that facilitates control.
High-performance suspension comes directly from the KX450. Spring rates and damping settings optimised for the X scene offer increased feedback, especially when riding on aggressive trails.
High-performance suspension comes directly from the KX450. Spring rates and damping settings optimised for the X scene offer increased feedback, especially when riding on aggressive trails.
Well-balanced frame from the KX450 contributes to the KX450X’s light weight, light handling, and slim ergonomics.
Well-balanced frame from the KX450 contributes to the KX450X’s light weight, light handling, and slim ergonomics.
KX factory-style skid plate and a convenient side stand are both standard equipment.
KX factory-style skid plate and a convenient side stand are both standard equipment.
Like the KX450, a hydraulic clutch offers direct feel and light lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
Like the KX450, a hydraulic clutch offers direct feel and light lever action. Less play as the clutch heats up during heavy use results in more consistent feeling.
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.
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.
Engine type | Liquid-cooled, 4-stroke, single-cylinder |
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Compression ratio | 12.5:1 |
Valve system | DOHC, 4 valves |
Bore x stroke | 96.0 x 62.1 mm |
Displacement | 449 cm³ |
Fuel system | Fuel injection: 44 mm x 1 |
Lubrication | Forced lubrication, wet sump |
Starting system | Electric |
Ignition system | Digital |
Transmission | 5-speed, return shift |
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Clutch | Wet, multi disc |
Primary reduction ratio | 2.727 (60/22) |
Gear ratios 1st | 1.750 (28/16) |
Gear ratios 2nd | 1.412 (24/17) |
Gear ratios 3rd | 1.188 (19/16) |
Gear ratios 4th | 1.000 (19/19) |
Gear ratios 5th | 0.875 (21/24) |
Final drive | Sealed chain |
Final reduction ratio | 3.923 (51/13) |
Frame type | Perimeter, aluminium |
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Trail | 120 mm |
Wheel travel front | 305 mm |
Wheel travel rear | 307 mm |
Tyre, front | 80/100-21 51M |
Tyre, rear | 120/90-18 65M |
L x W x H | 2,185 x 820 x 1,265 mm |
Steering angle L/R | 42° / 42° |
Wheel base | 1,485 mm |
Ground clearance | 335 mm |
Fuel capacity | 6.2 litres |
Seat height | 950 mm |
Curb mass | 111.6 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 49 mm |
Rear suspension type | Uni-Trak, adjustable dual-range (high/low-speed) compression and adjustable rebound damping, and spring preload adjustability |
Inpage Navigation Section: Accessories