Kawasaki KX 450F - 2012 Specifications and Reviews

The 2012 Kawasaki KX450F is a professional-grade motocross bike engineered for competitive riders seeking winning performance. Known for its potent engine, lightweight chassis at 113 kg, and sophisticated Uni-Trak suspension with extensive adjustability, it excels in championship-level racing. The aggressive lime green aesthetics and high 955 mm seat height define its serious, track-focused character.

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General information

CategoryCross / motocross
Year2012
ModelKawasaki KX 450F
 
 

Engine and Transmission Specifications

ClutchAutomatic
Transmission type,final driveChain
Gearbox5-speed
Cooling systemLiquid
IgnitionDigital DC-CDI
Fuel controlDOHC
Fuel systemInjection. DFI with 43mm Keihin throttle body
Valves per cylinder4
Bore x stroke96.0 x 62.1 mm (3.8 x 2.4 inches)
Compression12.5:1
Engine typeSingle cylinder, four-stroke
Capacity:449.00 ccm (27.40 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakes diameter240 mm (9.4 inches)
Rear brakesSingle disc
Front brakes diameter250 mm (9.8 inches)
Front brakesSingle disc
Rear suspensionUni-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.
Front suspension48mm inverted, Kayaba AOS with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment / 12.4 in.
Rake (fork angle)26.9°
Frame typeAluminum perimeter

Physical measures and capacities

Fuel capacity6.21 litres (1.64 gallons)
Wheelbase1,481 mm (58.3 inches)
Ground clearance330 mm (13.0 inches)
Overall width820 mm (32.3 inches)
Overall length2,179 mm (85.8 inches)
Overall height1,275 mm (50.2 inches)
Seat height955 mm (37.6 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc113.0 kg (249.1 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsLime Green
Factory warranty6 months

Performance Profile & Rider Fit

Best For

Track95%
City5%
Cornering90%
Daily Riding10%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a full-power motocross machine best suited to experienced off-road or racing riders, not beginners.
PurposeBuilt purely for closed-course motocross racing and aggressive off-road riding, not general transportation.
Rider FitDemands strong physical fitness and technique, with a tall 950mm seat height, kick start, and no seating comfort for extended riding.
CharacterA raw, high-strung, race-bred single-cylinder machine that rewards aggressive, committed riding with explosive acceleration and razor-sharp handling.
Not Ideal ForNot suitable for commuting, touring, passengers, or riders seeking comfort and low-maintenance road use.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2012 Kawasaki KX 450F Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 955mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2012 Kawasaki KX 450F, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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