2009Kawasaki KX450F

Rate this bike

37 fields on record

The 2009 Kawasaki KX450F is a competitive motocross machine designed for intermediate to advanced riders seeking a potent four-stroke platform. Its 449cc liquid-cooled single-cylinder engine delivers strong mid-range power and aggression on the track. Known for reliable performance and handling prowess, the KX450F establishes itself as a formidable competitor 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)

⇄ Compare with another bike All model years

What’s new for the 2009 Kawasaki KX450F

vs the 2008

Spec	2008	2009
Torque	40.0 Nm (4.1 kgf-m or 29.5 ft.lbs)	not listed
Fuel capacity	7.20 litres (1.90 US gallons)	7.00 litres (1.85 US gallons)
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.	UNI-TRAK linkage system and Kayaba shock with 22-position low-speed and stepless high-speed compression dampening, 22-position rebound dampening and fully adjustable spring preload / 12.4 in.
Compression	12.0:1	12.5:1

Other years 2008 2009

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?

Worked out in your browser - nothing is sent to us

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 2009 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)
Engine type: Single, four-stroke
Power/weight ratio: 0.5611 HP/kg (dry)
Bore x stroke: 96.0 x 62.1 mm
Compression: 12.5:1
Cooling system: Liquid
Fuel system: Injection
Starting: Kick
Ignition: Digital DC-CDI
Valves per cylinder: 4

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: 965 mm
Dry weight: 99.8 kg
Wet weight: 112.1 kg
Fuel capacity: 7.00 litres
Ground clearance: 340 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 and Kayaba shock with 22-position low-speed and stepless high-speed compression dampening, 22-position rebound dampening and fully adjustable spring preload / 12.4 in.
Rake (fork angle): 26.7°
Trail: 117 mm