Standard Features
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2014 Kawasaki 450

Climb Aboard a Motocross Dynasty. It’s no wonder that Kawasaki’s KX™ 450F has amassed an enviable championship record in AMA Supercross and AMA Motocross. Having a great rider definitely helps, and Monster Energy® Kawasaki’s Ryan Villopoto’s credentials are impeccable, including double-up titles in AMA Supercross and Motocross titles in 2011, followed by another AMA Supercross title in 2012. And in 2013, Villopoto made it three straight Supercross championships in a row, becoming the first rider to win back-to-back-to-back AMA Supercross titles since the great Ricky Carmichael, another rider whose career blossomed aboard Team Green™ machines.


Model Year
Lime Green
Stock Number


85.8 in.
50.2 in.
32.3 in.
Curb: 248 lbs.
Ground Clearance
13 in.
58.3 in.
Seat Height
37.6 in.


4-stroke single, DOHC, 4-valve cylinder head
449 cc
Bore x Stroke
96 x 62.1 mm
Compression Ratio
Fuel System
DFI® 43 mm Keihin throttle body
Fuel Tank Capacity
1.6 gal.
Digital DC-CDI




Front: (1) rigid-mount 250 mm petal disc with 2-piston caliper
Rear: (1) 240 mm petal disc with 1-piston caliper
Front: 80/100-21
Rear: 120/80-19


Front: 48 mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment; 12.4 in. travel
Rear: Uni-Trak® linkage system and Kayaba shock with 50 mm piston, 22-position low-speed and stepless high-speed compression dampening, 33-position rebound dampening and fully adjustable spring preload; 12.4 in. travel
4.4 in.

Standard Features

At a Glance…
 Launch Control helps to reduce wheelspin on slippery starting gates  
 Kayaba Pneumatic Spring Fork (PSF) uses compressed air to reduce weight, compared to traditional metal-coil fork springs, providing effective tuning and bottoming resistance  
 Includes a free Kawasaki Genuine PSF Air Fork Pump and removable adjustment valve for quick and easy tuning of fork spring pressure  
 Engine is tuned for optimum power delivery all the way from basement revs through the upper rpm range, this results in impressive thrust that continues from corner-exit to the end of the straights  
 Piston crown shape allows for superior ultra-low to mid-range engine response  
 Intake cam features slightly less lift, to promote better low-rpm throttle response  
 Front master cylinder features a knocker-style lever-to-piston interface for improved brake feel and more consistent performance than the old piston-type unit  
 Wide, low-density grips make life easy on the rider’s hands  
 Lightweight 240 mm petal-type rear rotor features the same aggressive petal style as the front rotor and is gripped by a single piston hydraulic rear caliper  
 Pre-programmed ignition maps are interchangeable trackside, no PC required  
 Adjustable 4-position handlebar and 2-position footpegs allow riders to fit the KX to match their personal preference  
 Black anodized aluminum rims for a factory look  
 Narrower grips are softer and more comfortable for 2014  
Engine Overview
 449 cc, liquid-cooled, DOHC, 4-stroke single with legendary Kawasaki power!  
 Works-based bridged-box bottom piston has optimum rigidity for maximum high-rpm power and durability  
 A forward lean angle of 3 degrees puts the engine in the ideal position for maximum traction  
 Highly balanced crankshaft, on par with Villopoto’s factory racer, creates minimal vibration and has a high inertial mass to help maximize rear wheel traction  
 Compact cylinder head is only 100 mm tall  
 Double valve springs help ensure stable valve operation and also allow for a short cylinder head height  
 Camshafts, lobes and tappet surfaces feature a soft-nitride treatment for long wear and high-rpm reliability  
 Automatic cam chain adjuster is maintenance-free  
 Crankshaft and connecting rod feature a special carburizing and quenching treatment to maximize rigidity, boosting long-term reliability without adding weight  
Digital Fuel Injection
 Digital Fuel Injection (DFI®) self-adjusts to atmospheric changes for easier starting, sharper throttle response and accessible power for jumping  
 It is not necessary to re-tune or change any jets to suit climatic conditions like carbureted models  
 Ultra-fine atomizing injector with 12 holes sprays particles with a droplet size of 60µ for smooth power delivery and engine response throughout the throttle range  
 43 mm throttle body uses a progressive throttle linkage to deliver airflow in much the same way as an FCR carburetor  
 Using 2 linked shafts, the throttle body opens more quickly after reaching the 3/8 open position  
 Fast-idle knob on the throttle body allows riders to increase engine speed when starting a cold engine  
 Fuel injector set at 45 degrees, the optimum angle for mid-range power  
High-performance Multi-map ECU
 Ignition timing boosts response when re-opening the throttle after deceleration (when landing jumps, etc.)  
 ECU programming is easily selectable via interchangeable DFI coupler caps that provide three preprogrammed maps for standard, hard (terrain) and soft (terrain), without the need for a separate programmer or laptop  
 The engine can be started with only three rotations of the crankshaft using the electricity generated by a single kick of the starter, no battery needed  
 The system delivers electricity to the bike’s electronics in sequence: first the ECU, then the fuel pump, and finally the injector for quick, easy starting  
 The compact, lightweight ECU, located on the front of the steering head behind the number plate, was designed specifically for motocross use. The fuel pump relay is integrated with the ECU to help cope with the shocks and vibrations of tough racing.  
Launch Control Mode
 Factory-style launch control system is an industry first and increases the ability to get good starts by maximizing available traction  
 Push-button activation of the Launch Control Mode retards ignition timing in first and second gears, giving the greatest effect within the first few seconds of releasing the clutch  
 Launch Control can be activated in neutral, first or second gear  
 Shifting into third gear automatically deactivates Launch Control Mode and returns the ignition to normal mapping  
Easy Starting
 Strong output from the large ACG rotor provides enough electrical power for the battery-less FI system to enable true one-kick starting without using a battery  
 Equipped with an automatic compression release (ACR) system for quick and easy starting. The dual-weight centrifugal decompression system is fitted to the exhaust cam.  
 Compression release features 1 mm of valve lift, to minimize the required kicking power  
Bridged-box Bottom Piston
 Piston crown shape tuned for excellent low to mid-range engine response  
 Same design as used on our factory racers; offers optimum performance at all rpm  
 Lighter and more durable than traditional piston designs  
 Short piston skirt features low-friction coating to minimize mechanical losses  
 Reinforced external ribs enhance strength and durability  
PSF Front Fork
 48 mm Kayaba Pneumatic Spring Fork (PSF) uses compressed air as a spring. The reduced weight and inertia of the air spring improves smoothness and enhances the fork’s ability to follow terrain contours.  
 Air spring significantly reduces friction and cuts weight by 1.7 lbs. per set, while also providing better bottoming resistance, less oil contamination, plus easier and more effective tuning compared to traditional springs  
 Large 32 mm diameter internal damping cartridges help provide consistent performance and bottoming resistance  
 A removable spring pressure adjustment valve and free Kawasaki Genuine PSF Air Fork Pump, are included for quick and easy tuning of fork spring pressure  
 Diamond-Like Carbon (DLC) coating on the outer surface of the inner fork tubes offers minimum stiction when the fork is exposed to lateral forces that would usually hamper slide action. The result is improved fork response, especially during cornering.  
 Friction-reducing Kashima Coat on the inside of the fork’s outer tubes contributes to smooth suspension action (especially at the initial part of the stroke)  
 Wrap-around fork tube guards offer effective protection for the sliders  
 Lower triple clamp features integrated locating pins to help simplify installation and removal of the front number plate  
 1-piece front fender attachment screws feature integrated grommets to simplify installation and removal  
Rear Shock
 33-position rebound damping adjuster allows precise fine-tuning of the rebound circuit  
 Easy adjuster access allows track-side suspension tuning with a minimum of hassle or lost time  
 Rear shock features dual compression adjustability, allowing 22-position high-speed and stepless low-speed damping adjustments to be made independently  
 Kayaba rear shock features a large 50 mm piston and a Kashima Coat treatment on the cylinder wall for reduced friction and smoother suspension action  
Aluminum Swingarm
 Tapered “D” shape swingarm is lighter than a comparable box-section unit and provides superior rigidity for its weight  
 Features tapered hydroformed spars and forged chain adjusters  
 Uni-Trak® rear suspension linkage is mounted below the swingarm to allow precise tuning and maximum rear suspension stroke  
Fuel Tank and Lightweight Aluminum Fuel Pump
 Compact 1.6 gallon fuel tank is formed using a blow molding process  
 Fuel pump features a 1-piece filter cover and body, eliminating the need for fuel return tube from pressure regulator  
 Features a plastic fuel filter cover that wraps around the inlet port and acts as a fuel trap to help ensure a stable fuel supply during vigorous motocross riding  
Efficient Cooling
 High-capacity Denso radiators feature tightly packed cores and a fin design that deliver superior cooling efficiency  
 Shroud shape features a slim profile and large cooling outlet hole to help keep excess heat to a minimum  
 Radiator louvers feature 4 small blades set at a shallow angle for minimum overlap and maximum air flow  
Strong and Durable Clutch
 Clutch assembly provides a direct feel and superb control of engagement  
 Excellent oil drainage reduces power loss caused by excess oil around the clutch basket  
 Friction plates with substantial friction material contribute to fade resistance and long service life  
 Clutch case cover features embossed logo and is painted silver, making scuffs and normal wear less noticeable  
Close-ratio 5-speed Transmission
 5-speed transmission and the engine’s broad torque curve gives riders more gear options for maximum drive on a wide range of tracks  
 Thick first gear offers excellent durability for launching off the line in high-traction situations  
Powerful Disc Brakes
 Front master cylinder features a knocker-style lever-to-piston interface for excellent feel and more consistent performance  
 Front brake pads offer a strong braking force and feel  
 Lightweight 250 mm front rotor is squeezed by a powerful 2-piston caliper and features an aggressive petal design to help clear mud and debris  
 Lightweight 240 mm petal-type rear rotor features the same aggressive petal style as the front rotor and is gripped by a 1-piston hydraulic rear caliper  
Rider Interface and Styling
 Narrower grips are softer and more comfortable for 2014  
 Long grips feature a pattern that makes life easier on the rider’s hands  
 Slender frame helps the bike feel compact and nimble, but tapers to become wider near the rider’s ankles to offer optimum grip and control  
 Wide 50 mm footpegs can be adjusted to alternate position, 5 mm lower than stock  
 Dual injected 2-tone, 1-piece plastic shrouds and side number plates are great looking, compact and lightweight  
 Black triple clamps and black anodized rims – just like Kawasaki’s factory teams  
 Blue finish on suspension adjusters and engine plugs look like the factory race parts  
 Slim seat design uses urethane foam designed to retain its original shape and provide optimum durability  
Additional Features
 Skid plate made of resin material offers great protection without excess weight  
 Clutch cable boot features a large quick adjuster, making it easy for riders to adjust clutch play on the fly  
 Rear caliper guard helps protect the caliper from damage  
 Ribless rear hub and butted spokes offer light weight and excellent durability  
Optional KX Accessories
 KX DFI Calibration Kit allows racers to reprogram the ECU’s data maps for volume of fuel injected and ignition timing to alter engine characteristics to suit rider preference. An ECU setting is available, which can also be used as a data logger, recording up to six hours of data, including engine rpm, degree of throttle opening, engine boost, coolant temp, air temp, ignition timing, fuel adjustments, gear position and system voltage.  
 Kawasaki recommends a 0 - 60 psi air pump with bleeder valve and no-loss Schrader valve connector, Kawasaki part# K5609-060A for adjusting fork air pressure with maximum accuracy and ease of use  

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