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2013 MODEL INFORMATION OVERVIEW --------------------- P.2 AT A GLANCE ------------------ P.4 KEY FEATURES ---------------- P.5 HARD-HITTING FUEL-INJECTED POWER ---- P.5 FACTORY-STYLE CHASSIS COMPONENTS AND TUNING ----------------------------------- P.14

ADDITIONAL FEATURES ---- P.23 COLOUR(S) ------------------- P.24 SPECIFICATIONS ------------ P.25 MODEL NAME




Version: 22 May 2012


Intended as a general reference for the preparation of sales promotion and marketing material, some of the material contained herein may not apply to your market.


CHAMPION PERFORMANCE KX design philosophy is simple: put mid-level to expert riders on the top step of the podium – and that is what the KX450F does best. Engine and chassis performance delivers what riders need to win. And complementing this dominant performance, the KX450F is loaded with advanced technology and industry firsts that give riders an even greater edge.

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Proven Performance Racing Dominance

Industry-leading Advanced Technology NEW

Next-generation suspension: Pneumatic Spring Fork (PSF)

2011 AMA SX Champion

Advanced design fork replaces springs with pressurised air.


More powerful engine

Increased performance at all rpm (especially ultra-low to medium-rpm torque) thanks to: - revised piston crown - revised ECU settings

Launch Control Mode PSF advantages:

2011 AMA MX Champion

- Increased bottoming resistance & road holding: During compression the counterforce generated by pressurised air is firmer than a spring; during rebound air offers less resistance than a spring. - Wider setting range: PSF range of adjustability (green) is much wider than AOS spring (grey).

2012 AMA MX Champion

AMA factory racer-spec system gives riders an edge when starting in low-grip conditions.

DFI Setting Data Selection Plug-and-play DFI couplers give riders easy access to 3 engine maps: Standard, Soft and Hard conditions. Each of the maps can be reprogrammed using the KX FI Calibration Kit.

Adjustable Ergonomics Riders are able to fine-tune their riding position with: - 4-position handlebar - 2-position footpegs

- Stepless setting adjustment: Riders are not limited to STD and optional “spring� settings.

- Hassle-free adjustment

- Significant weight reduction: 750 g lighter (total)

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AT A GLANCE Adjustable handlebar position - P.18 A choice of four positions allows riders to tailor their riding position. Factory-style Renthal handlebar and pad come standard.

Launch Control Mode - P.7 Factory-style launch control system increases the chance of getting a good start by helping riders maximise traction when starting on a slippery surface.

Setting-adjustable motocross ECU - P.9,11 Lightweight ECU was designed specifically to withstand the rigors of motocross racing. ECU contains three engine maps (plus a fourth for Launch Control Mode). Settings for the three maps can be reprogrammed with the optional KX FI Calibration Kit.

DFI Setting Data Selection - P.8 Using the provided DFI couplers, riders can quickly and easily access their choice of three maps (standard, hard, soft) provided in the new ECU.

NEW Pneumatic Spring Fork (PSF) - P.15


The KX450F is the first mass-production motocrosser to features this next-generation fork technology. Shock absorption duties are carried out using pressurised air instead of springs. Reduced weight, easier adjustability and a wider setting range are some of the advantages.

Slim, racer-friendly rider interface - P.18

Slim frame, minimalist bodywork and a flat tank-seat line were designed to make it easier for racers to go fast. New handle grips enable a more compact riding position.

Slim aluminium perimeter frame - P.14 Race-ready front suspension - P.17

Aluminium perimeter frame is a lightweight construction composed of forged, extruded and cast parts. Slim design contributes to racer-friendly ergonomics.

Diamond-Like Carbon coating reduces sliding friction for improved fork action, especially during cornering. Kashima Coat and high-precision machining further reduce friction.


NEW New Uni-Trak rear suspension - P.18

Front and rear petal brake discs are complemented by a new front brake master cylinder and front brake pads, for stronger braking performance and enhanced control.

Linkage mounts below the swingarm for more precise suspension tuning. Dual compression adjustability offers a wide range of tuning options. Kashima Coat on the tank cylinder improves action. For ’13, revised damping settings match the new front fork.

Adjustable footpeg position - P.19


Factory styling - P.22

Complementing the new front fender design and white rear fender, factory-style graphics, black alumite1 rims, black fork guards, blue alumite1 finish on the suspension adjusters, and a blue finish on some of the engine trim give the KX450F the looks to match its highly tuned performance.

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Petal brake discs - P.21

Riders can choose from two positions to suit body size and preference.

449 cm3 liquid-cooled, 4-stroke Single with battery-less fuel injection - P.5

Progressive throttle link - P.11

Fuel-injected engine offers hard-hitting power across the rev-range while ensuring stable fuel-metering in all conditions.

Lightweight 43 mm throttle body uses two shafts joined by a progressive link to give sharp response and excellent power feeling.


Factory-inspired tuning - P.6

Works-base bridged-box bottom piston (unique Kawasaki feature used for the first time on a mass-production motocrosser on the 10MY KX450F) is just one of many features inspired by our factory racers. For ’13, fine-tuning to the piston, intake cams and ECU settings result in increased performance, especially ultra-low to mid range torque.



HARD-HITTING FUEL-INJECTED POWER Fuel-injected 449 cm3 liquid-cooled, 4-stroke Single delivers hard-hitting power from low- through high-rpm. The broad powerband and responsive throttle offer a broad spread of torquey response that enables racers to get on the gas and go even from down low. In addition to the inherent benefits, fuel injection contributes to the KX450F’s lag-free acceleration, especially after landing jumps. Already featuring race-inspired tuning and parts like the high-performance piston with bridged-box bottom (a mass-production first when introduced on the 2010 KX450F), for 2013 engine fine-tuning and revised ECU settings offer increased performance, especially ultra-low to mid range torque. Other changes ensure the KX450F meets stricter noise regulations.

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Factory-racer engine tuning * High-performance piston, featuring the same design used on our factory racers, contributes to improved performance at all rpm. A short skirt, reinforced external ribs and the industry’s only mass-production use of a bridged-box bottom, featuring internal bracing, result in a lighter, stronger piston. NEW * Revised piston crown is 0.2 mm lower and features sloped edges

(instead of a step at the crown edge). The revised surface contributes to improved performance. (Compression ratio is unchanged.) (Photo 1)


NEW * Revised intake cam profiles with reduced lift (0.4 mm less) complement

the new piston and revised ECU settings, contributing to engine performance. NEW * Revised ECU settings (fuel and ignition maps) ensure the ideal fuel-air

mixture and offer a smoother power delivery when transitioning from low to high rpm, as well as improved engine braking characteristics. * Wedge-shaped crank web increases offsetting moment for a high crankshaft balance factor. At close to 60%, the balance factor of the ’13 KX450F is on par with Ryan Villopoto’s factory racer. The high balance factor contributes to reduced engine vibration, smoother power delivery and increased performance – especially at low rpm, where response is noticeably snappier. * In addition to generating the electrical output necessary to ensure easy starting, the large-diameter ACG also contributes to engine feeling at partial throttle.


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The holeshot advantage: Launch Control Mode KX motocrossers have long drawn on works technology to offer riders the best possible performance right out of the box. Launch Control Mode is just one of the factory features that give riders an edge when lining up at the start gate. * The KX450F features a launch control system similar to that on our factory racers. With the simple press of a button, riders can activate a separate engine map designed to ensure efficient race starts in slippery conditions. (The Launch Control Mode map retards ignition timing, allowing tyres to gain grip in low-traction situations, and allowing riders to focus on their lines.)


* Even for top-level riders, controlling the massive power of a 450cc-class motocrosser off the start requires a high degree of throttle control and clutch finesse. By slightly reducing this power, Launch Control Mode helps riders maximise traction, increasing the chance of getting a good start. * To activate Launch Control Mode riders depress the launch control button (for two seconds or more), located at the left handle. (When activated, the indicator lamp next to the button will flash quickly to let the rider know.) (Photo 2) 2

(Illustration A)

* Launch Control Mode has the greatest effect within the first few seconds of releasing the clutch off the start. This is the most crucial time for riders to get ahead of their rivals so they are better positioned going into the first corner.

* Launch Control Mode works in 1st and 2nd gear (and Neutral). Once the rider shifts into 3rd gear, the system is automatically disengaged, switching back to the normal engine map. * System designed to the same specifications as that of our AMA factory racers.

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Easy engine tuning: DFI Setting Data Selection (3 map choices) Adjusting engine settings to suit conditions has never been easier than with the KX’s DFI couplers. Plug-and-play style system is quick, easy and stress-free. * Instead of a single engine map, the ECU features three (four, counting the Launch Control Mode map).

* Each of the three maps can be reprogrammed using the optional KX FI Calibration Kit. (Please see below.)

* Initial settings for the three maps are: Standard, Hard (conditions) and Soft (conditions). Using provided DFI couplers, riders are able to easily switch between the three maps to suit riding conditions. Plugging in each of the 4-pin couplers activates the corresponding engine map. (Plug is conveniently located on the right side of the head pipe for easy access without having to remove any parts.) (Photo 3) 3




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Precision engine tuning: KX FI Calibration Kit (option) The KX FI Calibration Kit is the same kit used by Kawasaki’s works teams in Europe and the U.S. The kit enables expert riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference, record riding data, and analyse their riding data to further fine-tune their settings. * The KX FI Calibration Kit contains KX Racing software, an ECU controller, mounting equipment and dampers and a USB cable. In addition to the kit, some model-specific parts (available separately), a PC and 12 V battery are all that is required. (Photo 4) 4 4










most sample maps offered in industry

only data logging function in industry

choice of display

* While the kit is designed to satisfy racers and expert riders, it is simple and hassle-free to use: - the ECU controller mounts behind the number plate for easy access - accessing the ECU is accomplished simply by connecting to a PC via the ECU controller using a USB cable (no additional switches are necessary) - setting adjustments can be prepared in advance on a PC, or done when connected to the ECU - the kit’s user-interface is simple to understand and easy to use


* The KX FI Calibration Kit contains seven preset settings that can be quickly and easily used to adjust the ECU to suit track conditions. The provided settings are shown below. SETTING

11 5




Controller sub-harness† 2 USB cable 3 Software CD-ROM 4 Power supply harness 1


ECU mounting bracket† (replacement part for use with kit)

6 7



Controller bracket ECU controller

Wire harness clamp 9 Controller bands 10 Upper/lower controller dampers 11 Controller damper 8


Richer fuel setting

fuelling 5% richer than stock

Leaner fuel setting

fuelling 5% leaner than stock

Advanced ignition setting

ignition advanced 3o from stock

Retarded ignition setting

ignition retarded 3o from stock

Hard riding surface setting

ignition retarded, fuelling richer

Soft riding surface setting

ignition advanced, fuelling leaner

Beginner setting

engine power suppressed: ignition retarded, fuelling richer

Part is model-specific (KX450F, KX250F require different parts) and sold separately

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* For more advanced setting optimisation, the ECU maps for volume of fuel injected (via the FI adjustment window) and ignition timing (via the IG adjustment window) can be adjusted for given throttle position and rpm.

* Both click-and-drag (using the graph window) and numerical editing (using the map sheet) are possible. * When connected to the ECU, the KX FI Calibration Kit can be used to display the status of a running engine. Information can be displayed in numeric form using the Data Monitor, or in visual form using the various display options offered by the Data Meter.

Data Monitor Window

Base settings are shown as a flat graph (left). Settings can be increased or decreased from the base according to rider preference (right).

* Multiple display options are available. Click [3D Graph] or [2D Graph] of the [3D/2D] to select the 3 or 2-dimensional display. When you use the [3D Graph], select [Surface Display] or [Frame Display] of the [3D Graph Type] to select the display type.

Data Meter Window

* The KX FI Calibration Kit can also be used as a data logger, recording up to six hours of data depending on the number of parameters (engine rpm, angle of throttle opening, etc) being recorded. After riding, the riding data can be viewed using the [Analyze] window. Parameters to be recorded and displayed can be selected independently.

* The logged data can be lined up with the course layout to check actual riding, enabling more efficient FI settings to be determined. It also enables before-and-after comparisons and comparisons between riders. * Kit is compatible with both 64-bit operating systems (such as Windows 7) and 32-bit systems (Windows 7, XP, Vista). 3D Surface Display

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3D Frame Display

2D Graph Display

For more detailed information on use and functions of the FI Calibration Kit, please refer to the KX FI Calibration Kit Instruction Manual. 10


Battery-less fuel injection system Designed specifically for motocrossers, the fuel injection system incorporates a small lightweight ECU and operates without a battery to further eliminate unnecessary weight. And of course, fuel injection eliminates the need to adjust engine settings to suit track and climate conditions. * Ensuring quick starting without a battery was a prime directive when developing the KX450F’s fuel injection system. Using only electricity generated by the kick starter, the engine can be started with only three rotations of the crankshaft. The system delivers electricity in the following order: 1) ECU, 2) fuel pump, 3) injector. With a warm engine, starting can be accomplished in a single kick.

* Lightweight flat-bottom aluminium fuel pump is located in the plastic fuel tank. (Photo 5)


* The compact, lightweight ECU, located just in front of the steering head (behind the number plate), was designed specifically for motocross use. To help cope with the shocks and vibrations of motocross riding, the fuel pump relay is built in to the ECU. * The 43 mm throttle body makes use of a progressive throttle link to deliver airflow in much the same way as would a FCR carburettor. Using two linked shafts, the throttle body opens more quickly after the 3/8 open position, delivering sharp response and excellent power feeling. * Ultra-fine atomising injector with 12 holes sprays particles with a droplet size of 60 Âľm for smooth power delivery and improved engine response at partial throttle. * The injector was set at 45o, the optimum angle for improved mid-range power.

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* To ensure a stable fuel supply during vigorous motocross riding, the fuel pump features a unitised plastic fuel filter cover that wraps around the inlet port and acts as a fuel trap. (Unitising the filter cover, changing its material from rubber to plastic and eliminating the fuel return hose from the pressure regulator contribute to weight reduction.) * The Launch Control Mode indicator lamp will light up to warn of a problem with the FI system.



Other performance-enhancing engine characteristics * The engine was tuned such that the torque curve follows the limit of running resistance for as long as possible. (Unchecked, engine torque can exceed this limit, resulting in wheel spin, which does nothing to help forward momentum.) * Efforts were made to achieve the widest possible torque band, so that traction efficiency would be maximised for a greater part of the rev range. * The engine is almost upright (forward lean angle is 3o) to help place the bike’s centre of gravity in the ideal position for maximum traction. * Asymmetrical high-acceleration cams yield high intake efficiency. * During the cylinder head casting process, the cores for the intake ports were given a special coating to make the intake ports smoother. The extremely smooth surfaces that result increase intake efficiency at all rpm. * Lightweight titanium valves (IN: 36 mm; EX: 31 mm) reduce reciprocating weight and offer high-rpm reliability. * Aluminium valve spring retainers reduce reciprocating weight for reliable valve control at high-rpm. * Double valve springs also help ensure stable valve operation and allow a short cylinder head height.

* The screw-type adjuster on the cam chain tensioner is equipped with a pressure spring. Because the system automatically minimises the vibration caused by a loose cam chain, it greatly reduces the chance of a mishap during a race. (Non-automatic systems that are tuned incorrectly can actually adversely affect valve timing by putting too much pressure on the cam chain.) * The combination of the smooth-shifting, close-ratio 5-speed transmission with the KX450F’s low-rpm engine performance offers the rider the option to shift to a higher gear when traversing rough sections. This reduces the effect of sudden (unwanted) throttle input, allowing focus to be given to racing rather than careful throttle control. * In the event of a stalled engine during a race, getting it started again as soon as possible is a racer’s first priority, so the KX450F is equipped with an automatic compression release (ACR) system. The dual-weight centrifugal decompression system fitted to the exhaust cam eases starting in much the same way as a conventional lever-type system. * Sprocket-style chain drive roller helps smooth engine braking by reducing the effect of driveline lash when the rider gets off the gas quickly and play in the lower side of the chain suddenly tightens. The additional control facilitates corner entry.

* 32 mm thick, 127.8 mm wide radiators with wide fin and tube pitch offer resistance to mud build-up while maintain cooling performance. The radiators are strong enough that the reinforcing brackets could be eliminated, resulting in lower overall weight. * Large openings in the radiator shrouds promote airflow, contributing to cooling performance.

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Noise regulation counter-measures A number of features on non-North American models ensure that stricter 2mMAX 112 dB noise regulations are met. NEW

* Holes added to the tail pipe and baffle plate create a bypass route for exhaust air by providing an exit for air directed through the muffler’s packing wool. The space inside the end cap acts as a resonating chamber and provides additional silencer volume, both helping with noise levels. * Pinched cut-outs in the silencer chambers direct exhaust gases into the glass-wool packing, helping to muffle exhaust noise.


* Eliminating the hole on the right side of the air cleaner box helps meet the stricter regulations.


* Noise-absorbing pads added between the air cleaner and rear fender also contribute to meeting the new regulations. (A rib on the rear fender helps support the pad.)

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FACTORY-STYLE CHASSIS COMPONENTS AND TUNING The KX450F’s slim aluminium perimeter frame is a lightweight construction composed of forged, extruded and cast parts. Chassis balance and settings were all set to suit race-experienced riders. The centre of gravity and key dimensions (swingarm pivot, output sprocket and rear axle locations) were chosen so that the rear tyre would drive the bike forward (instead of causing it to squat). For 2013, chassis fine-tuning and the motocross industry’s first mass-production use of a Pneumatic Spring Fork offers lighter weight, easier adjustability and a wider setting range to complement the KX450F’s highly acclaimed high-speed stability, light handling and racer-friendly adjustable ergonomics.

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Next-generation suspension: Pneumatic Spring Fork The KX450F is the first mass-production motocross to feature KYB’s Pneumatic Spring Fork (PSF), replacing the main springs in each fork tube with pressurised air. Compared to a standard fork, the PSF offers the following benefits: - lighter weight - easy adjustability - wide setting range - reduced friction - increased bottoming resistance - improved road holding

NEW * Eliminating the springs from the forks allows an unprecedented

NEW * Because main springs are not used, changing the fork character is much

reduction in weight. Total weight savings is approximately 750 g. (Illustration B)


simpler on the PSF than changing the spring rate on a standard fork. Adjusting the air pressure in the fork easily allows the PSF “spring rate” to be adjusted – without the hassle of having to disassemble the fork. Adjustments to suit rider and track can be accomplished on site, without additional parts, and with minimal tools. (Illustration C) C

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NEW * Using a special adaptor (provided with the bike), air pressure can be

NEW * Friction generated between the springs and fork inner tubes in a

changed with any readily available bicycle tyre pump. (Using a pump with a built-in air gauge and a flexible hose is recommended.) (Photos 6-7) 6


standard fork is especially apparent in the latter half of the fork stroke. Eliminating the main springs alone reduces friction by approximately 20%. Replacing the pressure springs with free pistons further reduces friction. The balance springs used in the PSF’s cartridges are equipped with sliders to minimise friction. (Photos 8-9) 8


NEW * Simply changing the PSF’s air pressure covers the range of settings offered by optional springs for a standard fork. (Illustration D)


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NEW * Specially developed low-friction fork oil seals help ensure smooth initial

NEW * During the compression stroke, the pressurised air exerts a strong

fork action.

counterforce, contributing to bottoming resistance. However, during the rebound stroke, the pressurised air offers little resistance, contributing to increased road holding and a planted feel from the front.

NEW * With the elimination of the fork springs, internal construction could be

completely revised. The cylinders inside the fork tubes could be made much larger (ø24 mm >> ø32 mm), enabling pistons with approximately double the surface area for generating damping force. The result is increased bottoming resistance and stable damping force character (especially when changing from rebound to compression stroke). (Illustration E)



* Revised fork oil has a reduced tendency to cavitate.


* Compression and rebound damping settings can be adjusted as on a standard fork. * A super-hard DLC coating (Diamond-Like Carbon) on the outer surface of the inner fork tubes reduces sliding friction (and stiction) and gives better action, contributing to the smoother ride. The coating is even effective when the fork is exposed to lateral forces that would usually hamper slide action, such as during cornering. The increased surface hardness also minimises scratches and damage to the tubes. * Friction-reducing Kashima Coat on the inside of the fork outer tubes contributes to smoother suspension action (especially at the initial part of the stroke) and a better ride feel.

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Slim, adjustable rider interface

Race-oriented rear suspension NEW * Revised rear damping settings complement the front fork.

The KX450F’s frame and minimalist bodywork, designed with rider ergonomics in mind, offer a slim rider interface and racer-friendly ergonomics. Complemented by adjustable handle and footpeg positions, the natural riding position makes it even easier for racers to go fast.

* The rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately. * The rear shock also features the Kashima Coat on the tank cylinder. The reduced friction smoothes suspension action. * The New Uni-Trak rear suspension system mounts the suspension arm below the swingarm, allowing a longer rear suspension stroke. The longer stroke in turn allows more precise rear suspension tuning.


* Upper triple clamp with two sets of handle mount slots and reversible handle mounts offer riders a choice of four handle positions to choose from: 25 mm FWD, 15 mm FWD, STD and 10 mm BK. (Illustration F) F

(Photo 10)

* Extensive rider testing was conducted to determine the ideal linkage ratios and rear shock absorber damping settings to achieve maximum rear wheel traction.

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* Adjustable footpeg brackets enable riders to lower their footpeg position 5 mm. In the lower position, CofG is lowered as is the rider’s point of view, adding to both physical and psychological stability. (Illustration G)

* The flat design of the tank and seat gives the rider greater freedom of movement when changing riding position, and facilitates sitting farther forward. (Photo 11) 11


* Minimalist shrouds were designed to be small and are slim where they come in contact with the rider’s legs. 2-tone design was achieved using a double-injection moulding process. * Minimalist side covers were also made as small as possible. * The seat uses a slip-resistant top surface for good grip when seated and smooth sides for excellent rider mobility. Seat urethane helps maintain the original shape longer.

* Using an optional rear suspension tie rod (1 mm longer than normal), riders can lower their seat height by 4 mm (measured at the centre of the seat). While 4 mm may not sound like much, on a race bike being able to make ride position adjustments without any compromise to riding performance is extremely beneficial.

* Seams between the shrouds, seat and side covers are very flush, which facilitates control as well as moving around on the bike. (Photo 12)


* The frame is narrow across the main pipes, contributing to a slim package with good ergonomics. The slim riding position facilitates control.

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* The frame widens at the ankles to offer the rider better grip and narrows near the bend below the seat to allow a slim riding position. * Optimised exhaust pipe line also contributes to the racer-friendly ergonomics. * Wide (front-to-rear) footpegs designed to offer grip and superb feel at the pegs. * The clutch cable boot features a large quick adjuster, making it easier for riders to adjust play in the clutch cable. * Throttle grip has a unitised collar. The one-piece unit provides additional stability during throttle operation. NEW * Lightweight grips are 10 mm longer. The handlebar is the same length,

so with the new grips riders looking for a more compact riding position are able to grab the bars closer to the centreline. Grips, which feature a pattern designed to provide excellent grip, use a taller pattern and softer material to provide greater cushioning for riders’ hands. (Photos 13-14) 13

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Other race-oriented chassis components * The KX450F features petal brake discs front and rear. In addition to helping reduce unsprung weight, the wave shapes of the petal discs help clean the brake pads for more efficient braking performance.


NEW * A revised design for


the rear disc matches the design of the front disc. (Photo 17)

(Photo 15) NEW * A new pushrod-type

front brake master cylinder and front brake pads with a higher coefficient of friction result in stronger braking force and enhanced control (especially for the initial bite and initial-mid stroke characteristics).

16 * Rear caliper guard protects the caliper from damage. * A factory-style Renthal (standard-type) aluminium handlebar is standard equipment.


(Photo 18)

* Rib-less rear hub and butted spokes reduce unsprung weight.

(Photo 16)

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Factory styling NEW * Complementing the


minimalist bodywork, new fender and front number plate designs ensure the KX450F remains the sharpest looking bike in the paddock. (Photo 19)


* For 2013, the rear fender is white (instead of lime green), like on our factory racers. (Photo 20)

* Fork and rear shock adjusters have a blue alumite1 finish like our U.S. factory racers. (Photos 21-22) 21

20 * Blue finish on the oil cap and the two plugs on the generator cover further contribute to factory looks. * Embossed design on the clutch cover designed to gradually appear as contact from riding boots wears off the paint. NEW * Engine covers are

* Factory-style graphics complement the KX450F’s highly tuned performance.


finished in silver paint, further reinforcing the KX450F’s factory image. (Photo 23)


* Rims are coated in black alumite1 – just like our factory racers.

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* Fast-idle knob on the throttle body allows riders to increase engine speed when first starting a cold engine.

* The alloy swingarm uses a cast front section, tapered hydroformed spars and forged chain adjusters.

* The crankshaft and connecting rod received a carburising and quenching treatment for additional rigidity.

* Large synthetic skid plate offers great protection with minimum weight. NEW * Chain guide made of

* The camshaft lobes feature a soft-nitriding surface treatment for long wear and high-rpm reliability.

harder urethane offers increased durability.

* Tappet surfaces receive a carburising treatment for increased durability.

(Photo 24)


* A large flap inside the air cleaner case helps prevent the ingress of mud. * The silencer uses long-fibre packing which is much more resistant to being blown out of the tail pipe than standard length packing. As a result, packing needs to be replaced half as often. NEW

* On non-North American models, a greater (+3.5 mm) overlap between the baffle pipe and tail pipe offers increased reliability when the parts expand due to heat.

Other * Optional engine parts include magneto rotors with different inertias (8.5, 9.5 kg.cm2; STD: 9.0 kg.cm2). * Optional chassis parts include handlebar holders for a ø28.6 mm bar (STD: ø22.2 mm), aluminium and steel rear sprockets (48-52T; STD: 50T), solid petal brake rotors for wet races, and different springs for the front fork (4.6, 4.8 N/mm; STD: 4.7 N/mm) and rear shock (52, 56 N/mm; STD: 54 N/mm).

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COLOUR(S) * Lime Green with factory-style graphics


Alumite: an anodic oxidation finishing treatment for aluminium resulting in a coloured, corrosion/scratch-resistant film coating.

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Liquid-cooled, 4-stroke Single 3


Perimeter, aluminium

Wheel travel: front

314 mm


315 mm


80/100-21 51M


120/80-19 63M


449 cm

Bore and Stroke

96.0 x 62.1 mm

Compression ratio


Valve system

DOHC, 4 valves

Fuel system

Fuel injection: ø43 mm x 1 (Keihin)

Caster (rake)



Digital DC-CDI


113 mm


Primary kick

Steering angle (left/right)

42o / 42o


Forced lubrication, semi-dry sump





5-speed, return

Final drive


Primary reduction ratio

2.727 (60/22)

Compression damping


Gear ratios: 1st

1.750 (28/16)

Rebound damping



1.412 (24/17)


1.188 (19/16)


1.000 (19/19)


0.875 (21/24)

Front: Type

48 mm upside-down telescopic Pneumatic Spring Fork (PSF)

Rear: Type Compression damping

New Uni-Trak 22-way (low-speed), 2-turns or more (high-speed)

Final reduction ratio

3.846 (50/13)

Rebound damping



Wet multi-disc, manual

Spring preload

Fully adjustable

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KX450FDF BRAKES Front: Type


Single rigid-mounted 250 mm petal disc




Single 240 mm petal disc



DIMENSIONS Overall length

2,180 mm

Overall width

820 mm

Overall height

1,275 mm


1,480 mm

Ground clearance

330 mm

Seat height

955 mm

Curb mass

112.5 kg

Fuel capacity

6.2 litres The specifications mentioned here apply to and have been achieved by production models under standard operating conditions. We intend only to give a fair description of the vehicle and its performance capabilities but these specifications may not apply to every machine supplied for sale. Kawasaki Heavy Industries, Ltd. reserves the right to alter specifications without prior notice. Equipment illustrated and specifications may vary to meet individual markets.

2 0 1 3 M Y K X 4 5 0 F M O D E L I N F O R M AT I O N


KAWASAKI 450 model 2013  
KAWASAKI 450 model 2013  

Kawasaki KX 450F model 2013