Engineered by Kawasaki for the atv motorcycle segment, the 2009 Kawasaki KFX 450R relies on a 449 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke powerplant. Internal engine geometry specifies a bore and stroke of 96.0 x 62.1 mm (3.8 x 2.4 inches) with a 8.9:1 compression ratio.
On the scales, the KFX 450R measures 394.7 kg (870 lbs) dry. Rider ergonomics and chassis geometry center around a 785 mm (30.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,255 mm (49.4 in) wheelbase engineered for quick, flickable steering geometry. The 9.84-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Kawasaki archive, this model family spans 6 indexed model years from 2009 to 2014, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
785 mm (30.9 in)
Engine
Displacement449.0 ccm (27.40 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression8.9:1
Bore x Stroke96.0 x 62.1 mm (3.8 x 2.4 inches)
Valves/Cylinder4
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionSolid state with electronic ignition backup
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Frame TypeAluminum double cradle, racing type
Front SuspensionDual A-arms, coil-over shocks / 8.5 in
Rear SuspensionSwingarm with piggy-back reservoir shock, dual-rate spring / 10.0 in
Wheelbase1255 mm (49.4 inches)
Ground Clearance109 mm (4.3 inches)
Wheels & Brakes
Front Tyre21/7-10 (AT)
Rear Tyre20/10-9 (AT)
Front BrakesDouble disc
Front Brake Ø163 mm (6.4 inches)
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight394.7 kg (870.2 pounds)
Seat Height785 mm (30.9 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
