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2021 Kawasaki KX 450X
2021 Kawasaki KX 450X

Specs

General Information

Manufacturer
Kawasaki
Kawasaki
Model Year
2021
2021
Model
KX 450X
KX 450X
Model Code
KX450KMFNN
KX450KMFNN
Color
Lime Green
Lime Green

Brakes/Wheels/Tires

Brakes

Front - Single semi-floating 270 mm Braking® petal disc with dual-piston caliper

Rear - Single 250 mm Braking® petal disc with single-piston caliper

Front - Single semi-floating 270 mm Braking® petal disc with dual-piston caliper

Rear - Single 250 mm Braking® petal disc with single-piston caliper

Tires

Front - 80 / 100-21

Rear - 120 / 80-18

Front - 80 / 100-21

Rear - 120 / 80-18

Dimensions

Length
Overall - 86 in.
Overall - 86 in.
Height
Overall - 49.8 in.
Overall - 49.8 in.
Width
Overall - 32.3 in.
Overall - 32.3 in.
Weight

Curb without fuel- 235.8 lb.

Curb - 246 lb.** (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))

Curb without fuel- 235.8 lb.

Curb - 246 lb.** (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))

Ground Clearance
13.2 in.
13.2 in.
Wheelbase
58.5 in.
58.5 in.
Seat Height
37.4 in.
37.4 in.

Drivetrain

Transmission
5-speed, return shift, with wet multi-disc manual clutch and hydraulic clutch actuation
5-speed, return shift, with wet multi-disc manual clutch and hydraulic clutch actuation
Final Drive
Chain
Chain

Engine

Engine
4-stroke single, DOHC
4-stroke single, DOHC
Cooling
Liquid
Liquid
Displacement
449 cc
449 cc
Bore x Stroke
96 x 62.1 mm
96 x 62.1 mm
Compression Ratio
12.5:1
12.5:1
Clutch
Coned disc-spring hydraulic
Coned disc-spring hydraulic
Fuel System
DFI® with 44 mm Keihin throttle body
DFI® with 44 mm Keihin throttle body
Ignition
Digital CDI
Digital CDI
Starting
Electric
Electric
Fuel Capacity
1.64 gal.
1.64 gal.
Modes
Launch Control
Launch Control

Operational

Frame
Aluminum perimeter
Aluminum perimeter
Front Suspension

49 mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping

Travel - 12 in.

49 mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping

Travel - 12 in.

Rear Suspension

Uni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed / 19-way low-speed) compression damping, 22-way rebound damping and adjustable preload

Travel - 12.1 in.

Uni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed / 19-way low-speed) compression damping, 22-way rebound damping and adjustable preload

Travel - 12.1 in.

Rake
27.6°
27.6°
Trail
4.7 in.
4.7 in.
Handlebars
Renthal® Fatbar®
Renthal® Fatbar®

Other

Includes

Easy engine tuning

Finger-follower valve actuation

Slim, ergonomic bodywork

Easy engine tuning

Finger-follower valve actuation

Slim, ergonomic bodywork

Features

Cross-Country Capability

  • TAKE ON TOUGH TRAILS: The KX™450X motorcycle is built to meet the tough demands of cross-country racing. Cross-country wheels (F21"/R18") are paired with specific Dunlop Geomax AT81 tires developed for GNCC racing. A factory-style skid plate and a convenient side stand both come as standard equipment.

Ergo-Fit® Ergonomics

  • GET THE PERFECT FIT: Slim ergonomics stem from a narrow frame and minimalist bodywork. To help facilitate the perfect fit, the KX™450X motorcycle features ERGO-FIT® adjustability. Four handlebar positions and two footpeg positions allow you to tailor the KX450X to your body size, riding style and preference.

KX™ Chassis Performance

  • GAIN FULL CONTROL: Light and nimble handling is achieved thanks to the lean, lightweight chassis of the legendary KX™450 motocross bike. A well-balanced aluminum perimeter frame helps keep the overall weight down and allows for slim ergonomics. The high-performance, race-ready suspension has been optimized for cross-country racing, especially on aggressive trails. Large-diameter brakes deliver strong stopping power, offering a high level of control.

KX™ Engine Performance

  • POWER AHEAD: The same championship-proven engine performance found in KX™ motocross bikes is what propels the all-new KX™450X motorcycle. This fuel-injected 449cc 4-stroke engine delivers the type of hard-hitting power and a flat torque curve that encourages quick acceleration. Engine maps are optimized for cross-country racing, delivering the ideal amount of useable power. Electric start makes starting the engine as easy as a push of a button. A coned disc-spring hydraulic clutch offers a direct feel, light lever action, and consistent performance.

Cross-Country Capability

  • TAKE ON TOUGH TRAILS: The KX™450X motorcycle is built to meet the tough demands of cross-country racing. Cross-country wheels (F21"/R18") are paired with specific Dunlop Geomax AT81 tires developed for GNCC racing. A factory-style skid plate and a convenient side stand both come as standard equipment.

Ergo-Fit® Ergonomics

  • GET THE PERFECT FIT: Slim ergonomics stem from a narrow frame and minimalist bodywork. To help facilitate the perfect fit, the KX™450X motorcycle features ERGO-FIT® adjustability. Four handlebar positions and two footpeg positions allow you to tailor the KX450X to your body size, riding style and preference.

KX™ Chassis Performance

  • GAIN FULL CONTROL: Light and nimble handling is achieved thanks to the lean, lightweight chassis of the legendary KX™450 motocross bike. A well-balanced aluminum perimeter frame helps keep the overall weight down and allows for slim ergonomics. The high-performance, race-ready suspension has been optimized for cross-country racing, especially on aggressive trails. Large-diameter brakes deliver strong stopping power, offering a high level of control.

KX™ Engine Performance

  • POWER AHEAD: The same championship-proven engine performance found in KX™ motocross bikes is what propels the all-new KX™450X motorcycle. This fuel-injected 449cc 4-stroke engine delivers the type of hard-hitting power and a flat torque curve that encourages quick acceleration. Engine maps are optimized for cross-country racing, delivering the ideal amount of useable power. Electric start makes starting the engine as easy as a push of a button. A coned disc-spring hydraulic clutch offers a direct feel, light lever action, and consistent performance.