Motocross Bikes
2023Kawasaki KX450
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The 2023 Kawasaki KX450 is a competitive motocross machine designed for intermediate to advanced off-road racers. Powered by a liquid-cooled 449cc single-cylinder four-stroke engine with DOHC and fuel injection, it delivers responsive power and precise throttle control. Known for its lightweight aluminum perimeter frame and agile handling, the KX450 excels in both sandy and hard-packed track conditions.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 105.8 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
- 0.5293 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 CDI with 3 Coupler Options
- 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
- 820 mm
- Overall height
- 1265 mm
- Seat height
- 955 mm
- Dry weight
- 105.8 kg
- Wet weight
- 109.9 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 | 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 2023 Kawasaki KX450 has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX450 have?
The 2023 Kawasaki KX450 has a Power of 56.0 HP (41.2 kW).
How many gears does the Kawasaki KX450 have?
The 2023 Kawasaki KX450 has a Gearbox of 5-speed.
How much does the Kawasaki KX450 weigh?
The 2023 Kawasaki KX450 has a Dry weight of 105.8 kg (233.2 pounds).
Shop this bike
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The 2023 Kawasaki KX450 is a powerhouse of a motocross bike, offering top-of-the-line performance and agility. With a 449cc engine and agile chassis, this bike is designed to handle the most challenging of terrains with ease. The high-performance suspension system and lightweight frame make it easy to maneuver through tight corners and handle jumps with confidence. The KX450 also features advanced technology such as electric start and a hydraulic clutch, making it a top choice for serious motocross enthusiasts.
One of the standout features of the 2023 Kawasaki KX450 is its powerful engine, which delivers impressive torque and acceleration. The bike's ergonomic design and adjustable handlebars make for a comfortable ride, while the advanced fuel injection system ensures smooth and consistent power delivery. Whether you're a seasoned pro or a beginner rider, the KX450's cutting-edge features and impressive performance make it a top contender in the motocross world. If you're looking for a bike that can handle the toughest of tracks and deliver top-tier performance, the 2023 Kawasaki KX450 is a top choice.
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