2008Kawasaki KX450F

★ 5.0

38 fields on record

The 2008 Kawasaki KX450F is a competition-focused motocross bike engineered for serious off-road racers and experienced riders. Its potent 449cc single-cylinder engine delivers aggressive power with a sophisticated digital ignition system, making it renowned for exceptional performance on challenging terrain. The lightweight design and responsive handling establish it as a formidable platform in the 450cc motocross class.

Capacity: 449.0 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 99.8 kg
Seat height: 965 mm
Power: 56.0 HP (41.2 kW)

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What’s new for the 2008 Kawasaki KX450F

vs the 2007

Spec	2007	2008
Power	44.9 HP (33.0 kW)	56.0 HP (41.2 kW)
Torque	—	40.0 Nm (4.1 kgf-m or 29.5 ft.lbs)
Wet weight	113.6 kg (250.4 pounds)	112.1 kg (247.1 pounds)

Other years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail98%

Cornering70%

City riding5%

Daily riding5%

Touring5%

Two-up0%

Track60%

Best for: Built purely for motocross competition and off-road jumping, cornering, and racing on dirt tracks.
Built for: Light, explosive, and razor-sharp handling define this bike, rewarding aggressive, committed riding over relaxed cruising.
Not ideal for: Not suitable for street riding, commuting, touring, or carrying a passenger.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 965mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2008 Kawasaki KX450F, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

Find bikes that fit your height →

Full specifications

Engine

Capacity: 449.0 ccm
Power: 56.0 HP (41.2 kW)
Torque: 40.0 Nm (4.1 kgf-m)
Engine type: Single, four-stroke
Power/weight ratio: 0.5611 HP/kg (dry)
Bore x stroke: 96.0 x 62.1 mm
Compression: 12.0:1
Cooling system: Liquid
Fuel system: Carburettor
Starting: Kick
Ignition: Multi-map digital CDI with throttle position sensor (K-TRIC)
Valves per cylinder: 4

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet multi-disc

Dimensions & weight

Wheelbase: 1486 mm
Overall length: 2184 mm
Overall width: 820 mm
Overall height: 1280 mm
Seat height: 965 mm
Dry weight: 99.8 kg
Wet weight: 112.1 kg
Fuel capacity: 7.20 litres
Ground clearance: 345 mm

Chassis & suspension

Frame: Aluminum perimeter
Front suspension: 48mm inverted, Kayaba AOS with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment / 12.4 in.
Rear suspension: UNI-TRAK® linkage system with 22-position low-speed and variable high-speed compression dampening, 22-position rebound dampening and fully adjustable spring preload / 12.4 in.
Rake (fork angle): 27.1°
Trail: 117 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 250 mm
Rear brakes: Single disc
Rear brakes diameter: 240 mm
Front tyre: 90/70-21
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	2006	2008	2009	2012	2015	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	965 mm	965 mm	955 mm	955 mm	950 mm
Fuel capacity	7.2 L	7.2 L	7 L	6.2 L	6.2 L	6.2 L