Motocross Bikes
2025Kawasaki KX450
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The 2025 Kawasaki KX450 is a competitive motocross machine designed for experienced off-road riders seeking professional-level performance. Its 449cc liquid-cooled four-stroke engine delivers responsive power through advanced fuel injection and DOHC technology, while the 5-speed transmission enables precise control across varied terrain. Built for racing and serious trail riding, the KX450 is recognized for its aggressive handling and race-ready engineering.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 107.0 kg
- Seat height
- 960 mm
- Power
- 56.0 HP (41.2 kW)
What’s new for the 2025 Kawasaki KX450
vs the 2024| Spec | 2024 | 2025 |
|---|---|---|
| Seat height | 950 mm (37.4 inches) | 960 mm (37.8 inches) |
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
- 0.5234 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.1 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
- 1480 mm
- Overall length
- 2180 mm
- Overall width
- 820 mm
- Overall height
- 1270 mm
- Seat height
- 960 mm
- Dry weight
- 107.0 kg
- Wet weight
- 112.6 kg
- Fuel capacity
- 6.20 litres
- Ground clearance
- 345 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
- 115 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
- Comments
- Smartphone Connectivity via RIDEOLOGY THE APP
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 2025 Kawasaki KX450 has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX450 have?
The 2025 Kawasaki KX450 has a Power of 56.0 HP (41.2 kW).
How many gears does the Kawasaki KX450 have?
The 2025 Kawasaki KX450 has a Gearbox of 5-speed.
How much does the Kawasaki KX450 weigh?
The 2025 Kawasaki KX450 has a Dry weight of 107.0 kg (235.9 pounds).
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