Kawasaki KX450 - 2019 Specifications and Reviews

The 2019 Kawasaki KX450 is a competition-focused motocross bike engineered for experienced off-road racers and serious enthusiasts. Known for its powerful engine and aggressive handling characteristics, it delivers the performance needed for high-level racing and challenging terrain. The lightweight 110kg frame and responsive braking system make it ideal for riders seeking precision control and speed on the track.

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General information

CategoryCross / motocross
Year2019
ModelKawasaki KX450

Engine and Transmission Specifications

ClutchWet multi-disc, manual
Transmission typeChain   (final drive)
Gearbox5-speed
Cooling systemLiquid
IgnitionDigital
Fuel controlDouble Overhead Cams/Twin Cam (DOHC)
Fuel systemInjection
Bore x Stroke96.0 x 62.0 mm (3.8 x 2.4 inches)
Compression12.5:1
Engine typeSingle cylinder, four-stroke
Capacity:449.0 ccm (27.40 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakesSingle disc. Single-piston caliper.
Diameter270 mm (10.6 inches)
Front brakesSingle disc. Semi-floating petal discs
Rear tire120/80-19
Front tire80/100-21
Frame typePerimeter, aluminium
 
 

Physical measures and capacities

Fuel capacity6.20 litres (1.64 US gallons)
Wheelbase1485 mm (58.5 inches)
Ground clearance340 mm (13.4 inches)
Overall width830 mm (32.7 inches)
Overall length2185 mm (86.0 inches)
Overall height1275 mm (50.2 inches)
Seat height955 mm (37.6 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc110.0 kg (242.5 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterElectric
Color optionsLime Green

Performance Profile & Rider Fit

Best For

Track90%
City10%
Cornering85%
Daily Riding8%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a full-blown motocross competition bike best suited to experienced off-road or motocross riders, not beginners or road riders.
PurposeBuilt purely for motocross racing on closed circuits, jumps, and rough terrain rather than any form of street use.
Rider FitIts tall seat height, minimal weight, and aggressive ergonomics demand good rider fitness, strength, and off-road skill to control effectively.
CharacterA razor-sharp, lightweight, high-revving dirt weapon that rewards aggressive, athletic riding with explosive agility over jumps and rough tracks.
Not Ideal ForIt is not suitable for commuting, touring, passengers, or anyone seeking comfort, storage, or street-legal practicality.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2019 Kawasaki KX450 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 955mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2019 Kawasaki KX450, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2019 Kawasaki KX450 motorcycle is a powerful and sleek off-road machine. With a 449cc engine, it offers impressive performance and speed for riders looking to conquer rugged terrain. The bike's lightweight chassis and advanced suspension system make it easy to handle, while its electric start and hydraulic clutch add convenience to the riding experience. Overall, the KX450 is a top-notch choice for anyone seeking a high-performance dirt bike. The 2019 Kawasaki KX450 motorcycle is a game-changer in the off-road world. Its powerful engine and advanced features make it a force to be reckoned with on rugged terrain. The bike's lightweight design and advanced suspension system make it highly maneuverable, while its electric start and hydraulic clutch add ease to the riding experience. With its impressive performance and sleek design, the KX450 is a top pick for riders looking for a high-performance dirt bike.
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