Motocross Bikes
2020Kawasaki KX450
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The 2020 Kawasaki KX450 is a premier four-stroke motocross bike engineered for competitive and advanced amateur riders seeking high performance in professional racing environments. Known for its potent engine, lightweight chassis at 110 kg, and aggressive geometry, it delivers responsive handling and superior acceleration on challenging terrain. The electric starter, generous ground clearance, and reliable braking system make it a top choice for serious off-road competitors.
- 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
- CDI
- 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
- Aluminum perimeter
- 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 | 2020 | 2021 | 2023 | 2025 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 105 kg | 105 kg | 106 kg | 106 kg | 107 kg | — |
| Seat height | 955 mm | 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 | 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 2020 Kawasaki KX450 has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX450 have?
The 2020 Kawasaki KX450 has a Power of 56.0 HP (41.2 kW).
How many gears does the Kawasaki KX450 have?
The 2020 Kawasaki KX450 has a Gearbox of 5-speed.
How much does the Kawasaki KX450 weigh?
The 2020 Kawasaki KX450 has a Dry weight of 105.2 kg (231.9 pounds).
Shop this bike
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The 2020 Kawasaki KX450 is a standout motocross bike that delivers top-notch performance and handling. The 449cc engine provides ample power and torque, making it a force to be reckoned with on the track. With adjustable suspension and a lightweight chassis, this bike offers precise handling and excellent maneuverability. The electric start and hydraulic clutch add to the overall convenience and ease of use. Whether you're a seasoned pro or a beginner, the KX450 is sure to impress with its impressive speed and agility.
In addition, the 2020 KX450 features a sleek and modern design that is sure to turn heads. The bold Kawasaki graphics and signature lime green color scheme make for a visually striking bike. With a focus on both performance and style, this motorcycle is a standout choice for any motocross enthusiast. Overall, the 2020 Kawasaki KX450 is a top-of-the-line motocross bike that offers a winning combination of power, handling, and style. Whether you're hitting the track or tearing up the trails, this bike is sure to deliver an exhilarating and thrilling ride.
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