Motocross Bikes
2019Kawasaki KX450
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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.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 105.2 kg
- Seat height
- 955 mm
- Power
- 56.0 HP (41.2 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing on closed circuits, jumps, and rough terrain rather than any form of street use.
- Built for
- A razor-sharp, lightweight, high-revving dirt weapon that rewards aggressive, athletic riding with explosive agility over jumps and rough tracks.
- Not ideal for
- It is not suitable for commuting, touring, passengers, or anyone seeking comfort, storage, or street-legal practicality.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 449.0 ccm
- Power
- 56.0 HP (41.2 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.5323 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.0 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Digital
- Lubrication system
- Forced lubrication, semi‑dry sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc, manual
Dimensions & weight
- Wheelbase
- 1485 mm
- Overall length
- 2185 mm
- Overall width
- 830 mm
- Overall height
- 1275 mm
- Seat height
- 955 mm
- Dry weight
- 105.2 kg
- Wet weight
- 110.0 kg
- Fuel capacity
- 6.20 litres
- Ground clearance
- 340 mm
Chassis & suspension
- Frame
- Perimeter, aluminium
- Front suspension
- 49mm inverted telescopic coil-spring fork with 16-way compression damping and 16-way rebound damping
- Rear suspension
- Uni-Trak® gas charged shock with piggyback reservoir with dual-range (4 turns stepless high speed/19-way low-speed) compression damping, 38-way rebound damping and adjustable preload
- Front wheel travel
- 305 mm
- Rear wheel travel
- 307 mm
- Rake (fork angle)
- 27.6°
- Trail
- 122 mm
Brakes & wheels
- Front brakes
- Single disc. Semi-floating petal discs
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Single-piston caliper.
- Front tyre
- 80/100-21
- Rear tyre
- 120/80-19
Other
- Color options
- Lime Green
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2019 | 2021 | 2023 | 2025 | 2027 |
|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 105 kg | 106 kg | 106 kg | 107 kg | — |
| Seat height | 955 mm | 955 mm | 955 mm | 960 mm | 960 mm |
| Fuel capacity | 6.2 L | 6.2 L | 6.2 L | 6.2 L | 6.2 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Kawasaki KX450?
The 2019 Kawasaki KX450 has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX450 have?
The 2019 Kawasaki KX450 has a Power of 56.0 HP (41.2 kW).
How many gears does the Kawasaki KX450 have?
The 2019 Kawasaki KX450 has a Gearbox of 5-speed.
How much does the Kawasaki KX450 weigh?
The 2019 Kawasaki KX450 has a Dry weight of 105.2 kg (231.9 pounds).
Shop this bike
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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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