The Kawasaki KX 450F motorcycle specifications include a 449 cc (27.40 cu in) engine, a 5-speed gearbox, and a listed weight of 99.8 kg (220 lb).
Key specifications
2007, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018Model years
449 ccDisplacement
99.8 kgDry weight
965 mmSeat height
7.2 LFuel tank
1,486 mmWheelbase
345 mmGround clearance
Model years covered
2007201020112012201320142015201620172018
Year-specific specification changes
The 2007 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
Compression ratio
2010201612.5:1
2017201812.8:1
Front brakes
20132018Single disc. Petal disc with 2-piston caliper
Front suspension
2011Uni-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.
2013201448mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment / 12.4 in.
2015201648mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment
201749 mm inverted Separate Function front Fork Air – Triple Air Chamber (SFF-Air TAC). Compression damping: 22-way. Rebound damping: 20-way
2018Inverted Showa SFF-Air TAC fork with Triple Air Chamber, DLC coated sliders, 22-position compression and 20-position rebound damping adjustment
Front tire
2010201190/100-21
2013201880/100-21
Fuel system
2010Injection. 43mm Keihin Throttle body
2011Carburettor. 43mm Keihin throttle body
20122016Injection. DFI with 43mm Keihin throttle body
2017Injection. 43mm Keihin throttle body
2018Injection. DFI® w/43mm Keihin throttle body
Rear brakes
20132018Single disc. Petal disc with single-piston caliper
Rear suspension
2010UNI-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.
2011Uni-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.
2012Uni-Trak linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression damping, 22-position rebound damping and fully adjustable spring preload / 12.4 in.
20132014UNI-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.
20152016UNI-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
2017Uni-Trak. Compression damping: 19-way (low-speed), 4-turns or more (high-speed). Rebound damping: 22-way. Spring preload: Fully adjustable
2018Uni-Trak® linkage system and Showa shock, 19-position low-speed and 4-turns high-speed compression damping, 22-position rebound damping and fully adjustable spring preload
Wheelbase
201020161,481 mm (58.3 inches)
201720181,495 mm (58.9 inches)
Fuel capacity
201220186.21 L (1.64 US gal)
Ground clearance
2010340 mm (13.4 inches)
2011335 mm (13.2 inches)
20122016330 mm (13.0 inches)
20172018335 mm (13.2 inches)
Ignition
20102018Digital DC-CDI
Overall height
201220161,275 mm (50.2 inches)
Overall length
201220162,179 mm (85.8 inches)
201720182,195 mm (86.4 inches)
Rake
2010201126.7°
2012201726.9°
201828.2°
Seat height
2011960 mm (37.8 inches)
20122016955 mm (37.6 inches)
20172018950 mm (37.4 inches)
Additional useful specifications
| Front tire size | 90/90-21 |
|---|---|
| Rear tire size | 120/80-19 |
| Front tire width | 90 mm |
| Front tire aspect ratio | 90% |
| Front rim diameter | 21 in |
| Rear tire width | 120 mm |
| Rear tire aspect ratio | 80% |
| Rear rim diameter | 19 in |
| Bore/stroke ratio | 1.55:1 (Oversquare) |
Model information
| Category | Cross / motocross |
|---|
Engine specifications
| Engine type | Single cylinder, four-stroke |
|---|---|
| Displacement | 449 cc (27.40 cu in) |
| Bore × stroke | 96.0 x 62.1 mm (3.8 x 2.4 inches) |
| Compression ratio | 12.0:1 |
| Cooling system | Liquid |
| Fuel system | Carburettor. Keihin FCR40 |
| Fuel control | Double Overhead Cams/Twin Cam (DOHC) |
| Ignition | Multi-map digital CDI with throttle position sensor (K-TRIC) |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Chain (final drive) |
Chassis and suspension
| 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 | 27.1° |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Single disc |
| Front tire | 90/90-21 |
| Rear tire | 120/80-19 |
Dimensions and weight
| Dry weight | 99.8 kg (220 lb) |
|---|---|
| Seat height | 965 mm (38.0 inches) |
| Overall length | 2,184 mm (86.0 inches) |
| Overall width | 820 mm (32.3 inches) |
| Overall height | 1,280 mm (50.4 inches) |
| Wheelbase | 1,486 mm (58.5 inches) |
| Ground clearance | 345 mm (13.6 inches) |
Fuel and emissions
| Fuel capacity | 7.19 L (1.90 US gal) |
|---|
Other specifications
| Color options | Lime Green |
|---|---|
| Price as new | US$ 6849. MSRP depends on country, taxes, accessories, etc. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Kawasaki models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Kawasaki information before relying on them. Visit the official Kawasaki website.