Motocross Bikes
2011Kawasaki KX 450F
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The 2011 Kawasaki KX450F is a high-performance motocross bike designed for intermediate to advanced riders competing at the national level. Powered by a 449cc liquid-cooled four-stroke engine, it delivers aggressive power delivery and precise handling through its steel backbone frame. Known for its competitive edge in MX racing, the KX450F combines reliability with race-winning performance.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 99.8 kg
- Seat height
- 960 mm
- Power
- 44.9 HP (33.0 kW)
What’s new for the 2011 Kawasaki KX 450F
vs the 2010| Spec | 2010 | 2011 |
|---|---|---|
| Front suspension | 48mm inverted, Kayaba AOS with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment / 12.4 in. | Uni-Trak linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression damping, 33-position rebound dampening and fully adjustable spring preload / 12.4 in. |
| Rear suspension | UNI-TRAK linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression dampening, 22-position rebound dampening and fully adjustable spring preload / 12.4 in. | Uni-Trak linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression dampening, 33-position rebound dampening and fully adjustable spring preload / 12.4 in. |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for closed-course motocross racing and aggressive off-road riding, not general transportation.
- Built for
- A raw, high-strung, race-bred single-cylinder machine that rewards aggressive, committed riding with explosive acceleration and razor-sharp handling.
- Not ideal for
- Not suitable for commuting, touring, passengers, or riders seeking comfort and low-maintenance road use.
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
- 44.9 HP (33.0 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4499 HP/kg (dry)
- Bore x stroke
- 96.0 x 62.1 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Digital DC-CDI
- Valves per cylinder
- 4
- Lubrication system
- Forced lubrication, semi and #8209;dry sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall length
- 2184 mm
- Overall width
- 820 mm
- Overall height
- 1280 mm
- Seat height
- 960 mm
- Dry weight
- 99.8 kg
- Wet weight
- 113.4 kg
- Fuel capacity
- 7.20 litres
- Ground clearance
- 335 mm
Chassis & suspension
- Frame
- Backbone frame, high-tensile steel
- Front suspension
- Uni-Trak linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression damping, 33-position rebound dampening and fully adjustable spring preload / 12.4 in.
- Rear suspension
- Uni-Trak linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression dampening, 33-position rebound dampening and fully adjustable spring preload / 12.4 in.
- Front wheel travel
- 315 mm
- Rear wheel travel
- 315 mm
- Rake (fork angle)
- 26.7°
- Trail
- 127 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 250 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 240 mm
- Front tyre
- 90/100-21
- 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 | 2007 | 2011 | 2014 | 2016 | 2018 |
|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 100 kg | 100 kg | 100 kg | 100 kg | 100 kg |
| Seat height | 965 mm | 960 mm | 955 mm | 955 mm | 950 mm |
| Fuel capacity | 7.2 L | 7.2 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 KX 450F?
The 2011 Kawasaki KX 450F has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX 450F have?
The 2011 Kawasaki KX 450F has a Power of 44.9 HP (33.0 kW).
How many gears does the Kawasaki KX 450F have?
The 2011 Kawasaki KX 450F has a Gearbox of 5-speed.
How much does the Kawasaki KX 450F weigh?
The 2011 Kawasaki KX 450F has a Dry weight of 99.8 kg (220.0 pounds).
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