Motocross Bikes
2017Kawasaki KX 450F
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The 2017 Kawasaki KX450F is a competitive four-stroke motocross bike designed for experienced riders seeking aggressive performance. Known for its powerful engine and responsive handling, it excels in both amateur and professional racing environments. The lightweight frame and advanced suspension geometry deliver precise control across varied terrain and track conditions.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 99.8 kg
- Seat height
- 950 mm
- Power
- 44.9 HP (33.0 kW)
What’s new for the 2017 Kawasaki KX 450F
vs the 2016| Spec | 2016 | 2017 |
|---|---|---|
| Front suspension | 48mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment | 49 mm inverted Separate Function front Fork Air - Triple Air Chamber (SFF-Air TAC). Compression damping: 22-way. Rebound damping: 20-way |
| 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 | Uni-Trak. Compression damping: 19-way (low-speed), 4-turns or more (high-speed). Rebound damping: 22-way. Spring preload: Fully adjustable |
| Wheelbase | 1481 mm (58.3 inches) | 1495 mm (58.9 inches) |
| Compression | 12.5:1 | 12.8:1 |
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
- 12.8:1
- Cooling system
- Liquid
- Fuel system
- Injection
- 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
- 1495 mm
- Overall length
- 2195 mm
- Overall width
- 820 mm
- Overall height
- 1280 mm
- Seat height
- 950 mm
- Dry weight
- 99.8 kg
- Wet weight
- 108.8 kg
- Fuel capacity
- 6.20 litres
- Ground clearance
- 335 mm
Chassis & suspension
- Frame
- Perimeter, aluminium
- Front suspension
- 49 mm inverted Separate Function front Fork Air - Triple Air Chamber (SFF-Air TAC). Compression damping: 22-way. Rebound damping: 20-way
- Rear suspension
- Uni-Trak. Compression damping: 19-way (low-speed), 4-turns or more (high-speed). Rebound damping: 22-way. Spring preload: Fully adjustable
- Front wheel travel
- 305 mm
- Rear wheel travel
- 305 mm
- Rake (fork angle)
- 26.9°
- Trail
- 127 mm
Brakes & wheels
- Front brakes
- Single disc. Petal disc with 2-piston caliper
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Petal disc with single-piston caliper
- Rear brakes diameter
- 240 mm
- 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 | 2007 | 2011 | 2014 | 2016 | 2017 | 2018 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc | 449 cc |
| Dry weight | 100 kg | 100 kg | 100 kg | 100 kg | 100 kg | 100 kg |
| Seat height | 965 mm | 960 mm | 955 mm | 955 mm | 950 mm | 950 mm |
| Fuel capacity | 7.2 L | 7.2 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 KX 450F?
The 2017 Kawasaki KX 450F has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Kawasaki KX 450F have?
The 2017 Kawasaki KX 450F has a Power of 44.9 HP (33.0 kW).
How many gears does the Kawasaki KX 450F have?
The 2017 Kawasaki KX 450F has a Gearbox of 5-speed.
How much does the Kawasaki KX 450F weigh?
The 2017 Kawasaki KX 450F has a Dry weight of 99.8 kg (220.0 pounds).
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