Kawasaki KX 450F - 2018 Specifications and Reviews

The 2018 Kawasaki KX450F is a high-performance four-stroke motocross bike designed for intermediate to advanced riders seeking competitive racing capability. Known for its potent engine delivery and aggressive handling characteristics, it excels in both sand and hard-packed terrain. The lightweight frame and responsive suspension setup make it ideal for riders prioritizing speed and precision control.

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General information

CategoryCross / motocross
Year2018
ModelKawasaki KX 450F
 
 

Engine and Transmission Specifications

ClutchWet multi-disc
Transmission type,final driveChain
Gearbox5-speed
Cooling systemLiquid
Lubrication systemForced lubrication, semi and #8209;dry sump
IgnitionDigital DC-CDI
Fuel controlDouble Overhead Cams/Twin Cam (DOHC)
Fuel systemInjection. DFI® w/43mm Keihin throttle body
Valves per cylinder4
Bore x Stroke96.0 x 62.1 mm (3.8 x 2.4 inches)
Compression12.8:1
Engine typeSingle cylinder, four-stroke

Brakes, suspension, Frame and wheels

Rear brakes diameter240 mm (9.4 inches)
Rear brakesSingle disc. Petal disc with single-piston caliper
Front brakes diameter270 mm (10.6 inches)
Front brakesSingle disc. Petal disc with 2-piston caliper
Rear tyre120/80-19
Front tyre80/100-21
Rear wheel travel305 mm (12.0 inches)
Rear SuspensionUni-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
Front wheel travel305 mm (12.0 inches)
Front SuspensionInverted Showa SFF-Air TAC fork with Triple Air Chamber, DLC coated sliders, 22-position compression and 20-position rebound damping adjustment
Trail127 mm (5.0 inches)
Rake (fork angle)28.2°
Frame typePerimeter, aluminium

Physical measures and capacities

Fuel capacity6.21 litres (1.64 gallons)
Wheelbase1,495 mm (58.9 inches)
Ground clearance335 mm (13.2 inches)
Overall width820 mm (32.3 inches)
Overall length2,195 mm (86.4 inches)
Overall height1,280 mm (50.4 inches)
Seat height950 mm (37.4 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc108.8 kg (239.8 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterKick
Color optionsLime Green

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

2018 Kawasaki KX 450F Rider Ergonomics Assessment

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

Feet:

At 950mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2018 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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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2018 Kawasaki KX 450F is a top-of-the-line motocross bike that offers impressive power and handling. With a 449cc engine and lightweight aluminum frame, this motorcycle is designed for high performance on the track. The advanced suspension system and responsive brakes provide excellent control, making it an ideal choice for experienced riders. The sleek design and quality construction of the KX 450F make it a standout in the competitive motocross market. Overall, the 2018 Kawasaki KX 450F is a remarkable motocross bike that delivers on performance and style. Its powerful engine, advanced suspension, and precision handling make it a top choice for serious riders. Whether you're hitting the track or tackling challenging terrain, the KX 450F is a reliable and powerful companion for any motocross enthusiast. Experience the thrill of the 2018 Kawasaki KX 450F and take your riding to the next level.
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