First Look: 2009 Kawasaki KX Models 5

Are you ready for a First Look at the '09 Kawasaki KX450F and Kawasaki KX250F? So are we...and yep, the rumors you've been hearing are true. Kawasaki is joining the ranks of the EFI motocross bikes with their 450F. The following text and specs on each of the bikes were supplied by Kawasaki.

For photo galleries on each of the bikes (with wallpaper-sized images), check out the respective links below.

Photo Gallery: 2009 Kawasaki KX85
Photo Gallery: 2009 Kawasaki KX100
Photo Gallery: 2009 Kawasaki KX250F
Photo Gallery: 2009 Kawasaki KX450F
Photo Gallery: 2009 Kawasaki Monster Energy Bikes

Oh, and each of these models is also available in a Monster Energy version with black bodywork that matches the black wheels, along with green hubs, and Monster graphics. That tacks on a couple hundred bucks to the final price tag. Ah, the price of exclusivity.

2009 KX™65

Tomorrow’s champions start here

Young riders craving a crack at racing once they’ve mastered the basics need the perfect bike to take that first step. Enter the ideal choice, the Kawasaki KX™65. Whether it’s a day at the track with a group of friends or competing in a fully-sanctioned motocross race, the KX65 is an excellent platform for developing and honing racing skills. With its liquid-cooled, high-performance engine, full-race chassis, long-travel suspension and disc brakes, the smallest KX model is a perfect beginning for young riders who aspire to motocross greatness.

This one is of the Special Edition Monster Energy bike, not the standard KX65.

Moving the KX65 along is its liquid-cooled, 64cc two-stroke engine mated to a smooth-shifting, six-speed manual transmission with a manual clutch. The engine is bolted into a semi-double-cradle steel frame, and like the larger KX models, the KX65’s swing arm uses the UNI-TRAK® linkage system, which applies progressively stiffer damping and spring rates to the single rear shock as the suspension is compressed. The shock and fork boast four-way adjustable rebound damping for optimal handling.

Lightweight aluminum rims reduce unsprung weight to help improve suspension action, and both wheels feature hydraulic disc brakes that not only provide great stopping power, but require little maintenance and simplify wheel removal.

Youngsters who race their KX65 at designated events are eligible to receive support from Team Green™, Kawasaki’s amateur racing support program. Each year, Team Green provides regional support vehicles and highly trained technicians at more than 100 events, offering technical information and assistance to those who race Kawasaki products. Kawasaki also offers a comprehensive contingency program for amateur and professional riders who place well at designated events.

Features

64cc Two-Stroke Engine

• Digital ignition offers ideal timing for better throttle response throughout the rev range

• Rotor equipped with rare-earth magnets making it smaller, lighter and more durable with low inertial moment improves low-rpm response

• High capacity ignition coil delivers a higher secondary voltage for a hotter spark; the punchier response gives an improved acceleration feeling

• Connecting rod big-end bearing has a cage for durability

• Primary gear is secured using a lock-nut to help reduce mechanical noise

• The oil seal of the left crankcase has a stopper for increased engine reliability

• Metafoam gaskets are used for the generator cover, water pump cover and water pump elbow for improved sealing

Electrofusion Cylinder

• Advanced exhaust and transfer ports for increased power and performance at higher rpm

• Bridge between exhaust ports is machined for increased reliability and resistance to wear and seizure

• Lightweight cylinder liner transfers heat efficiently

Liquid Cooling

• Large radiator provides more even-running temperatures, keeping the power output consistently strong

• Provides greater reliability and less wear on the engine

24mm Mikuni Carburetor

• Feeds a four-petal reed valve for excellent throttle response

• Allows the engine to produce more power and torque at all rpm

Six-speed Transmission

• Positive action and rugged durability

• Hard chrome-finished shift-fork ends resist wear

• Manual clutch mechanism mirrors larger KX models

• Clutch cover gasket made of metal-carbon composite material

High-tensile Steel Frame

• Exceptional torsional rigidity for excellent handling

• Reinforced down tube for increased strength and durability

• Engine and chassis bolts have rust-resistant coating

Front Fork

• Four position rebound-damping adjustment accommodates different riding styles and terrain

UNI-TRAK® Rear Suspension

• Rising-rate action, so as the suspension compresses, the spring and damping strength increase progressively for a more controlled ride

Nitrogen-charged Shock

• Four-way adjustable rebound damping offers a variety of settings for various track conditions

• External reservoir helps maintain consistent damping

• Rebuildable aluminum body

Swingarm

• Rocker arm made from forged aluminum to reduce weight and improve durability

Front and Rear Disc Brakes

• Light and powerful

• Revised front brake lever shape offers better feel

• Resist fading

• Require less lever pressure

Aluminum Rims

• Reduce unsprung weight for improved suspension action

Detachable Aluminum Silencer

• Silencer is removable from the exhaust pipe and the packing is replaceable

• Oval shape mimics the styling of larger-displacement KX models

Specifications

2009 KX™85

The next step for aspiring champions

Whether it’s a growing, young rider building upon a foundation of skills or an older beginner seeking to start racing, the Kawasaki KX™85 is the perfect motorcycle for the next level of motocross completion. A budding racer’s dream, the KX85 is powered by a liquid-cooled, two-stroke, single-cylinder 84cc engine that churns out race-winning power and is packed with high-tech features, such as an Electrofusion-coated cylinder with a narrow squish band and large volume combustion chamber to enhance top-end power.

Fuel delivery for is provided by a 28mm Keihin carburetor that features a crescent-slide to position the needle closer to the intake ports. The Kawasaki Integrated Power-valve System (KIPS®) and tuned exhaust pipe contribute to the KX85’s tractable power delivery, which translates into better drive off the corners and more control for young riders of varying skill levels.

Hard chrome-finished shift fork ends, a thick base on the clutch basket housing and an additional bushing on the input shaft are features that provide enhanced durability and make the KX85’s smooth-shifting six-speed transmission really shine.

The KX85 utilizes a high-tensile steel perimeter frame, with a specially designed gas tank that sits inside the frame, lowering the fuel load and center of gravity for improved handling –yet another beneficial feature borrowed from KX85’s larger siblings.

Long-travel suspension at both ends helps to smooth out the roughest course for riders of every size and skill level. The 36mm inverted cartridge front fork has the capability of 18-way compression damping adjustment. Out back, the spring preload, compression and rebound damping are all adjustable on the proven UNI-TRAK? rear suspension system.

Those who race their KX85 at designated events are eligible to receive support from Team Green™, Kawasaki’s amateur racing support program. Each year, Team Green provides regional support vehicles and highly trained technicians at more than 100 events, offering technical information and assistance to those who race Kawasaki products. Kawasaki also offers a comprehensive contingency program for amateur and professional riders who place well at designated events.

Features

Liquid-cooled, two-stroke, single-cylinder 84cc Engine

• Lightweight Electrofusion-coated cylinder improves heat transfer while resisting abrasion and seizure

• Bridges between intake and exhaust ports are machine finished for less wear and improved reliability

• Liquid-cooling means even-running temperatures and consistent power output

• Rotor comes with rare-earth magnets –the unitized piece is small, light and more efficient with low inertial moment improves low-rpm response

• Connecting rod big-end bearing has more rigid cage for improved durability

• Intake port shape and cylinder skirt allow cooling air into the crankcase chamber

• Primary gear is secured using a lock-nut to help reduce mechanical noise

• Metafoam gaskets for the generator and water pump covers improve sealing

Kawasaki Integrated Power Valve System (KIPS®)

• KIPS system varies exhaust-port height for increased horsepower and torque at all rpm

• Produces a broad powerband with more low-end torque and mid-range, while retaining excellent top-end power

• Breather in KIPS cover improves high-rpm and overrun performance

Clutch

• Thick base clutch hub rides on needle bearings for smooth action

• Large clutch plates are 119mm in diameter for durability and control

• Clutch-release lever ratio is designed for light clutch lever action

• Clutch plate service cover simplifies maintenance and utilizes a metal-carbon composite gasket

28mm Keihin PWK carburetor

• Large crescent slide carburetor positions the needle closer to intake ports for excellent throttle response and improves power

• Adjustable for various conditions

Airbox

• Large right-side cutout improves airflow for increased power

• Reusable foam air filter

Exhaust System

• Features large-diameter O-ring and groove on exhaust pipe for improved durability and easy installation

• Aluminum silencer is re-packable like larger KX models

Six-speed Transmission

• Positive shifting action and rugged durability

• Fifth and sixth gears on the input shaft ride on bushings for added reliability

• Shift forks are hard chrome finished to resist wear and seizing

• Convenient oil level window

• Bushings on the second, third and fourth gears on the output shaft increase durability

High-tensile Steel Perimeter Frame

• Wide footpegs for better control, made of cast steel for strength

• Thick footpeg mounting brackets withstand today’s rigorous tracks

• Engine and chassis bolts have rust-resistant coating

Fuel Tank

• Gas tank design lowers center of gravity for improved handling

UNI-TRAK® Rear Suspension

• The swingarm uses large cross-section beams for improved rigidity and control

• Cast-aluminum drive chain adjuster sections for easy chain adjustments

• Shock is fully adjustable for compression and rebound damping and spring preload

36mm Inverted Cartridge Fork

• Inverted forks are rigid, providing better steering response and control

• Compression damping is 18-way adjustable

• Aluminum upper fork tubes measure 49.5mm in diameter for flex-free performance

Front and Rear Disc Brakes

• Front brake lever shape offers better feel

• Forged-aluminum rear brake pedal is strong, lightweight and features two seals at the pivot for smooth operation and increased durability

• Strong braking power is achieved with minimal effort

Front and Rear Wheels

• Rear hub features two wheel bearings on the drive side of the hub for durability

• Rear-axle diameter is large for more rigidity

Graphics

• Aggressive Kawasaki Lime Green and Black graphics just like larger KX models

Specifications

*Specifications are subject to change.

2009 KX™100
The logical path to the big leagues

Bridging the gap between the mini ranks and a full-size Lites-class motorcycle is the Kawasaki KX™100 motorcycle. With its larger wheels and tires, the KX100 provides adolescent racers with an appropriately-sized machine, allowing them to focus on riding technique instead of on controlling excessive power.

Besides larger wheels than an 85 class machine, the KX100 also sports a bigger 99cc liquid-cooled, two-stroke engine. It breathes through a 28mm carburetor with a carbon-fiber intake reed valve to aid throttle response and is fitted with the Kawasaki Integrated Power-valve System (KIPS®) to help produce a broad powerband with good low-end torque and strong top-end power. The engine is connected to a smooth-shifting, six-speed transmission, which gives the KX100 a gear for every situation on the race track.

The engine is bolted into a high-tensile steel perimeter frame with the specially designed gas tank located inside the frame to lower the fuel load and center of gravity for improved handling.

Adjustable long-travel suspension at both ends helps to smooth even the roughest motocross courses.

The 36mm inverted cartridge fork has compression damping adjustment capability and the UNI-TRAK® rear suspension system comes equipped with a shock that is fully adjustable for spring preload, compression and rebound damping. In the braking department, both front and rear discs are mounted with shoulder bolts for easier maintenance.

The KX100 also features aggressive Kawasaki Lime Green and Black graphics just like larger KX models.

Those who race their KX100 at designated events are eligible to receive support from Team Green™, Kawasaki’s amateur racing support program. Each year, Team Green provides regional support vehicles and highly trained technicians at more than 100 events, offering technical information and assistance to those who race Kawasaki products. Kawasaki also offers a comprehensive contingency program for amateur and professional riders who place well at designated events.

Features

Liquid-cooled, 99cc, Two-stroke Engine

• Utilizes a separate clutch cover on the right side of the engine for quick servicing without removing the water pump cover

• Liquid-cooling assures even-running temperatures, consistent power output and greater reliability

• Bridges between intake and exhaust ports are machine finished for increased durability

• Rotor comes with rare-earth magnets –the unitized piece is small, light and more efficient with low inertial moment improves low-rpm response

• Connecting rod big-end bearing has more rigid cage for improved durability

• Intake port shape and cylinder skirt allow cooling air into the crankcase chamber

• Primary gear is secured using a lock-nut to help reduce mechanical noise

• Metafoam gaskets for the generator and water pump covers improve sealing

Kawasaki Integrated Power Valve System (KIPS®)

• KIPS system varies exhaust port height for increased horsepower and torque at all rpm’s

• Produces a broad powerband with more low-end torque while retaining excellent top-end power

• Breather in KIPS cover improves high-rpm and overrun performance

28mm Keihin Carburetor

• Crescent slide carburetor puts the needle closer to the intake ports for excellent throttle response

• Adjustable for various conditions

Clutch

• Clutch hub rides on needle bearings for smooth action

• Large clutch plates are 119mm in diameter for durability and control

• Clutch-release lever ratio provides light clutch lever action

• Thick clutch basket housing improves durability

• Clutch plate service cover simplifies maintenance and utilizes a metal-carbon composite gasket

Six-speed Transmission

• Fifth and sixth gears on the input shaft ride on bushings for added reliability

• Positive shifting action and rugged durability

• Allows the engine’s full potential to be realized

• Provides oil level window

• Hard chrome-finished shift forks resist wear and seizure

High-tensile Steel Perimeter Frame

• Wide footpegs for better control, made of cast steel for strength

• Thick footpeg brackets withstand today’s rigorous tracks

• Engine and chassis bolts have rust-resistant coating

Fuel Tank

• Positioned in the frame to lower center of gravity and improve handling

UNI-TRAK® Rear Suspension

• Swingarm uses large cross-section beams for more rigidity and control

• Swingarm incorporates cast-aluminum drive chain adjuster sections for easy chain adjustments

• Flanged collars at the bearings to protect the seals from mud

• Fully adjustable shock with compression, rebound damping and spring preload adjustments

36mm Inverted Cartridge Fork

• Aluminum upper tubes are 49.5mm in diameter for excellent control and steering response

• Compression damping is 18-way adjustable

Front and Rear Disc Brakes

• Front brake lever shape offers better feel

• Forged-aluminum rear brake pedal is strong, lightweight and features two seals at the pivot for smooth operation

Front and Rear Wheels

• Rear hub features two wheel bearings on the drive side of the hub for durability

• Thick spokes are used in the front and rear for stronger wheels, requiring less adjustment

• Light weight aluminum rims

Graphics

• Aggressive Kawasaki Lime Green and Black graphics just like larger KX models

Specifications

*Specifications are subject to change.

 

2009 Kawasaki KX™250F

Race-ready performance that hammers the competition

On the racing circuit, winners must constantly improve to remain on top. Kawasaki’s KX™250F motocrosser is no exception. A leading performer in the 250 four-stroke ranks, the KX250F has successfully defended against challenges to its top spot for the last three years. However, there’s no resting on laurels in this group, not to mention the primary need of every racer on the starting line is a machine that can deliver wins yet remain highly reliable throughout the season.

Kawasaki engineers met the challenge and answered the call with the new 2009 KX250F. This world-beating racer has been thoroughly reinvented with a new slimmer look, lighter handling, better ergonomics and a host of changes that enhance engine performance and improve durability.

The 2009 KX250F features a cylinder head with a new intake port design that’s smoother, freer flowing, better sealed and holds new stronger titanium valves with a longer service life. New factory-level crankshaft balance and a tapered titanium exhaust pipe add up to smoother and more impressive power delivery from the 249cc, liquid-cooled, four-stroke engine.

A revised crank web significantly increases the crankshaft balance factor to a level on par with Kawasaki’s factory racers. The end result is reduced engine vibration, smoother power delivery and a noticeable improvement in low rpm throttle response. From the first crack of the throttle, to wide-open at the rev limiter; this new engine generates controllable, class-leading performance.

The KX250F’s engine cooling capacity was increased via a new water jacket routing for more effective flow and larger radiators with new louvers for enhanced thermal efficiency. Increased from three to four blades, the new louvers are smaller with a shallower angle to flow more air.

Engine oil volume was lowered to 1.3L to reduce weight and mechanical loss while a new KX450F type crankcase scavenge pump oil filter was added for easier maintenance. The transmission durability was boosted with a bigger interval between the gear shafts that allows the use of stronger gears, and there are new, stronger clutch and generator covers.

By switching to a new ratchet drive shift mechanism and integrating the clutch cable holder into the crankcase; Kawasaki’s engineers were able to deliver improved shifting and clutch lever feel from the new transmission. The lever ratios, spring rates and shaft locations were also revised.

Part of the KX250F’s slimmer feel is its new aluminum perimeter frame and sub-frame. A blend of forged, extruded and cast parts, the new frame uses fewer parts and gussets, is 2.2 lbs lighter than the 2008 model and is designed to provide enhanced stability with a better rigidity balance and improved drive from the rear tire. The main frame spars were reshaped and provide a 6mm narrower overall profile at the rider’s knees. A new manufacturing process and down tube design shed weight, and work in harmony with relocated engine mounts to improve rigidity balance.

Working in conjunction with the frame revisions is a new aluminum swingarm now pivoting from a higher position on the frame for improved traction. It is now a lighter, more tapered design with a “D” profile and a new cross bracket. A longer rear suspension stroke, and thus more precise rear suspension tuning, was achieved by mounting the suspension arm of the Uni-Trak® rear suspension system below the swingarm.

A new rear Showa shock with a large 50mm piston diameter has a revised layout and damping characteristics that offer better response, improved bottoming performance and ride feel. Also featuring a Kashima Coat on the shock internals, the rear shock settings should please riders.

With the chassis balance and suspension settings tuned to suit experienced racers, the KX250F offers a host of new features for better cornering and handling. Included in the Showa fork upgrades is a Lites-class first; titanium coated inner tubes. This dark navy blue coating not only decreases stiction, but also provides a super-hard surface to help prevent scratches and damage to the tubes. Further contributing to smooth suspension action; the inner surface of the outer fork tubes has a friction-reducing Kashima Coat treatment.

Optimized rigidity balance was achieved by reshaping and stiffening the upper triple clamp, as well as reshaping and decreasing the rigidity of the outer fork tubes. A 1mm reduction in fork off-set, revised suspension settings and enlarged, wrap around tube guards round out the fork enhancements.

Durability improvements weren’t limited to internal components on the new KX250F. Its larger, resin skid plate and narrower, longer lasting chain guide - both offering greater protection without higher weight - are examples of the race-oriented durability improvements that abound on the new KX250F. Part of the sleek new bodywork styling, the one-piece, dual injected, two-tone black and green plastic shrouds and side number plates translate into less time hassling with backgrounds and graphics and more time collecting trophies. Plus, the longer lasting finish, with fewer graphics to wear off, helps stretch racer’s dollars that much further.

In addition to giving the KX250F a stunning new look; the completely revised bodywork was designed with rider comfort and ergonomics in mind. Offering the rider an even slimmer interface with natural positioning makes it easier for racers to stay relaxed and in control. Ergonomic enhancements include improved feel from the wider 50mm foot pegs, a slimmer new seat design with firmer urethane foam, a non-slip top surface and smooth sides provides good seated grip and excellent rider mobility.

The rest of the KX250F is equally impressive, with premium-quality Renthal aluminum handlebars included as standard equipment along with black triple clamps, number plates, engine covers, hubs and wheels. Factory-style graphics finish off the package and compliment the KX250F’s stellar on-track performance.

Racers who ride their KX250F at designated events are eligible to receive support from Team Green™, Kawasaki’s amateur racing support program. Each year, Team Green provides regional support vehicles and highly trained technicians at more than 100 events, offering technical information and assistance to those who race Kawasaki products. Kawasaki also offers a comprehensive contingency program for amateur and professional riders who place well at designated events.

Kawasaki Motors Corp., U.S.A. (KMC) markets and distributes Kawasaki motorcycles, ATVs, personal watercraft, utility vehicles and recreation utility vehicles through a network of more than 1,500 independent retailers, with an additional 7,700 retailers specializing in Kawasaki power products and general purpose engines. KMC and its affiliates employ nearly 2,400 people in the United States, with 400 of them located at KMC's Irvine, California headquarters.

Kawasaki’s tagline, “Let the good times roll.™”, is recognized worldwide. The Kawasaki brand has become synonymous with powerful, stylish motorcycles for over four decades. Information about Kawasaki’s complete line of recreational products and Kawasaki affiliates can be found on the Internet at www.kawasaki.com.

Features

All-new Engine higher performing and more durable

• 249cc, liquid-cooled, four-stroke, four-valve, DOHC engine delivers hard-hitting power from mid- to high-rpm

• Engine oil capacity decreased from 1.5L on previous model to 1.3L, reducing overall weight and mechanical losses

New Top End

• New cylinder head has revised intake ports for improved performance at all rpm, especially in the high-rpm range

• Special coating applied to the intake port cores during the casting process gives the intake ports extremely smooth surfaces and increased intake efficiency across the rev range

• Head gasket now silicon coated for improved sealing

• New cam chain tensioner spring reduces mechanical loss by approximately 30 percent

New Intake and Exhaust Valves

• Formed from a new, highly rigid, titanium material, the lightweight 31mm intake and 25mm exhaust valves reduce reciprocating weight and offer greater high-rpm reliability

• Ultra-strong valves have extremely thin valve stems on par with those found in supersport machines with the intake valves featuring 0.25mm thicker heads for increased strength

New Titanium Exhaust Pipe

• Tapered, expanding from approximately 35 to 45mm for better throttle response and performance at all rpm

• New silencer body shape to meet 99dB AMA noise regulations

New Crankshaft Balance

• A revised crank web significantly increases the crankshaft balance efficiency; it’s now on par with the factory racers

• Results in reduced engine vibration, smoother power delivery and increased performance in the mid-high rpm range

Better Cooling

• New 6.4mm wider radiators have a 6 percent larger capacity than previous model

• Very slim, high-capacity Denso radiators feature tightly packed cores and a fin design deliver superior cooling efficiency for excellent heat dispersion

• Radiator louvers increased from three to four and decreased in size and angle for less overlap and higher air flow

• Revised cylinder head water jacket routes coolant via the front of the cylinder head for a more even cooling performance

Improved Transmission

• Ratchet drive shift mechanism replaces the previous models gear driven system for improved shift feel and durability

• Improved feel at the clutch lever by integrating the clutch cable holder with the crankcase

• Increasing the interval between gear shafts 1 mm further allows stronger gears to be used

• KX450F type crankcase oil filter added

• Relocated scavenge oil filter screen (with new shape) can be accessed without splitting the crankcases, facilitating easier maintenance

• New clutch and generator covers for increased rigidity and better crash survivability

New Aluminum Perimeter Frame

• Frame has a new 6 mm slimmer overall width main spars shape - narrowing near the bend below the seat for a riding position, then widening at the ankles to offer better grip

• Newly designed main, lower and gusset pieces around the fuel tank with revised cross sections

• Rigidity increased by moving upper engine mounts to sides of the head cover

• New design is 2.2 lbs lighter than previous model

• Weight savings and rigidity balance aided by down tube with a smaller cast bracket that’s now formed via a swaging (squeezing and hammering) process

• Swingarm pivot is located higher in the frame for improved rear wheel traction

• Sub-frame is 1.3 pounds lighter via larger diameter tubing with thinner walls, yet still provides a secure mounting for the new silencer

New Aluminum Swingarm

• New tapered “D” shaped cross section design is 5mm taller at the front (up from 74 to 79mm) and 2 mm shorter at the rear (down from 60 to 58mm)

• Features a new cross bracket design

• Provides a 0.9 lbs weight savings over the previous model

• Alloy swingarm uses a cast front section, tapered hydroformed spars and forged chain adjusters

• Uni-Trak® rear suspension system mounts the suspension arm below the swingarm, allowing a longer rear suspension stroke and more precise tuning

• Design improves stability, rigidity and rear wheel traction

New Front Fork

• Showa twin-chamber fork keeps oil and air in separate chambers for stable damping performance during long motos

• Super-hard titanium coating on the outer surface of the inner fork tubes reduces stiction and improves suspension action. The increased surface hardness of the dark navy blue coating also helps prevent scratches and damage to the tubes

• Friction-reducing Kashima Coat on the inside of the outer fork tubes contributes to smoother suspension action, especially during the initial part of the stroke

• Ideal rigidity balance via increased rigidity in the reshaped upper triple clamp and decreased rigidity of the outer fork tubes

• Offset decreased from 24.5mm to 23.5mm, which combined with the frame’s revised rigidity balance and revised suspension settings, helps produce lighter handling

• Enlarged, wrap around black fork tube guards provide greater protection for the inner tubes

• Revised race-oriented suspension settings offer all-around performance improvement

New Rear Shock

• New Showa rear shock features a revised layout and revised damping characteristics for improved performance

• Better response and improved feeling, even when fully-bottomed

• Features Kashima Coat on the tank cylinder for reduced friction and smoother suspension action

• Rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately

• Easier accessibility for tuning

New Skid Plate

• Resin material offers greater protection without a weight increase

New Chain Guide

• More slim and compact, down from 42.7 to 34mm wide, with 2mm thicker wear pad

• Reduced weight and longer wear

Improved Rider Interface and Styling

• Foot peg width (front to rear) increased from 46mm on previous model to 50mm for improved feel

• All-new body work and graphics

• New dual injected 2-tone, one-piece plastic shrouds and side number plates

• Right side panel has an added passageway to aid in cooling the silencer

• Black plastic covers, triple clamps, number plates, and engine covers

• Rims are coated in black alumite – just like the factory racers

• New seat design that’s slimmer with firmer urethane for improved ergonomics and feel

• Seat has a slip-resistant top surface for good grip when seated and smooth sides for excellent rider mobility

Additional Features

• Larger front brake lever boot offers increased protection against dust

• Clutch cable boot features a large quick adjuster, for easy clutch cable play adjustment on the fly

• Throttle grip has a one-piece collar that provides additional stability during throttle operation

• Lightweight short-length grips feature a pattern designed to provide excellent grip

• Rear caliper guard protects the caliper from damage

• Ribless rear hub and butted spokes reduced unsprung weight

Specifications*

*Specifications are subject to change.

2009 Kawasaki KX™450F

A leaner, stronger and EFI equipped racing thoroughbred

Comprehensively re-designed with a new fuel-injected engine, chassis, bodywork and extensive durability enhancements, the 2009 Kawasaki KX™450F motocrosser is sleeker, faster and more high-tech than ever. Although it has undergone the biggest makeover since its original 2006 debut, the new KX450F still shares a clear bloodline with its championship-winning predecessors.

The upgrade to Electronic Fuel Injection (EFI) eliminates the need to adjust engine settings to suit track and climate conditions and offers stable fuel-metering even in tough motocross conditions – without sacrificing the hard-hitting character of its predecessor. The new EFI system includes a compact lightweight ECU, a 43mm throttle body, a newly designed lightweight aluminum in-tank fuel pump and an ultra-fine atomizing injector. Set at a 45° angle for ideal mid-range power, the 12-hole injector sprays precise 60 micron fuel particles for smooth power delivery and improved engine response at partial throttle.

Designed specifically for motocross, the KX450F’s lightweight EFI system doesn’t require a battery – the engine can be started within three rotations of the crankshaft, using only the electricity generated through the kickstarter. Kawasaki engineers achieved single-kick start capability by having the ECU power-up at the initial movement of the kickstarter. The system delivers electricity in the following order: ECU, fuel pump, and then injector.

The EFI system’s increased electrical needs are handled by a new larger AC generator rotor that also increases the engine’s rotational inertia. A reshaped and lighter crankshaft, with its rotational inertia unchanged, balances out the bigger ACG rotor. A wedge-shaped crank web increases the offsetting moment to help achieve a crankshaft balance factor of close to 60 percent. This is on par with Kawasaki’s factory racers. The end result of these changes is reduced engine vibration, smoother power delivery and a noticeable improvement in low rpm throttle response.

The new engine is more compact and lighter, with a 5mm shorter cylinder head that also features revised intake and exhaust ports for improved engine performance through the entire rpm range. A new piston with a reshaped top surface raises the engine’s compression ratio from 12.0 to 12.5:1 and works in conjunction with a new one-piece titanium exhaust pipe to provide improved low-mid range performance. Rounding out the powertrain enhancements is a larger-volume silencer body that’s able to meet future noise regulations. It uses long-fiber packing that lasts longer and extends service intervals.

Overall, the new KX450F’s ample power is delivered in a smoother, more user-friendly manner with a linear low-rpm throttle response and torque delivery that reduces fatigue and allows riders to go faster for more laps.

Design of the aluminum frame, suspension components and settings was focused on translating this broad powerband and responsive throttle into better drive off the corners. Other goals of the ’09 revisions were lighter handling and a slimmer chassis with an optimized rigidity balance. To achieve these aims, every part was examined or revised. The cross-sections of the main spars were shrunk, the head pipe is slimmer and a new process was used to form the down tube, while the reshaped sub-frame is narrower yet stronger.

A blend of forged, extruded and cast parts, the revised chassis dimensions, parts reduction and gussets of the new frame equal a 1.8 pounds weight savings and an increase in stability and traction, thanks to improved rigidity balance.

Working in conjunction with the frame revisions is a new aluminum swingarm now pivoting from a 3mm higher position on the frame. The swingarm features a more tapered design with a “D” profile and new cross bracket. A longer rear suspension stroke, and thus more precise rear suspension tuning, was achieved by mounting the arm of the Uni-Trak® rear suspension linkage below the swingarm.

Complementing the chassis balance with settings optimized for experienced racers, the KX450F’s suspension offers a host of new features for better cornering and sharper handling. The Kayaba Air-Oil-Separate (AOS) fork has a new Diamond-Like Carbon (DLC) coating on the outer surface of the inner fork tubes which offers a 15 percent reduction in stiction when the fork is exposed to lateral forces that hamper slide action. The result is improved fork response, especially during cornering. The overall suspension action is even smoother due to the friction-reducing Kashima Coat treatment on the inside surfaces of the outer fork tubes and the rear shock reservoir.

Increasing the rigidity in the reshaped upper triple clamp and decreasing it in the new outer fork tubes optimized the rigidity balance of the front end. Adjusting the race-oriented suspension settings and reducing the fork offset from 24 to 23mm further enhanced the new KX450F’s lighter handling and increased its front wheel traction. Enlarged, wrap around black fork tube guards provide greater protection for the inner tubes.

Matching the smooth action of the fork, the Kayaba rear shock received a new body design and a larger 50 mm piston (previously 46 mm). Its improved response, damping and bottoming performance equate to a better ride and increased maneuvering precision. It also features a Kashima Coat treatment on the shock internals. Its easily accessible dual compression adjustability - allowing high-speed and low-speed damping to be tuned separately - gives mechanics and riders the ability to fine-tune for difficult track conditions.

Durability enhancements are not limited to internal components on the new KX450F. The larger, resin skid plate and narrower, longer lasting chain guide both offer better protection without increased weight and are examples of the race-oriented durability improvements that abound on the new KX450F.

In addition to giving the ’09 KX450F a stunning new look, the bodywork was completely revised with the main focus on rider comfort and ergonomics. Offering the rider an even slimmer interface with a natural positioning makes it easier for racers to relax and go fast. Included in the sleek new bodywork styling are one-piece dual injected, two-tone green and white plastic shrouds and side number plates. This new bodywork translates into less time hassling with backgrounds and graphics and more time collecting trophies.

A slimmer new seat design with firmer urethane, a non-slip top surface and smooth sides provides good seated grip and excellent rider mobility. The frame echoes the slim profile at the top, but widens at the lower end by the ankles to provide the rider with better feel and control. Completing the rider interface improvements are wider 50mm footpegs that offer increased grip and a more comfortable platform.

The 2009 KX450F will be available in Kawasaki Lime Green, with black alumite-coated rims and aggressive graphics for a factory appearance.

Racers who ride their KX450F at designated events are eligible to receive support from Team Green™, Kawasaki’s amateur racing support program. Each year, Team Green provides regional support vehicles and highly trained technicians at more than 100 events, offering technical information and assistance to those who race Kawasaki products. Kawasaki also offers a comprehensive contingency program for amateur and professional riders who place well at designated events.

Kawasaki Motors Corp., U.S.A. (KMC) markets and distributes Kawasaki motorcycles, ATVs, personal watercraft, utility vehicles and recreation utility vehicles through a network of more than 1,500 independent retailers, with an additional 8,000 retailers specializing in Kawasaki power products and general purpose engines. KMC and its affiliates employ nearly 3,650 people in the United States, with 430 of them located at KMC's Irvine, California headquarters.

Kawasaki’s tagline, “Let the good times roll.™”, is recognized worldwide. The Kawasaki brand has become synonymous with powerful, stylish motorcycles for over four decades. Information about Kawasaki’s complete line of recreational products and Kawasaki affiliates can be found on the Internet at www.kawasaki.com.

Features and Benefits

All-New Fuel Injection

• Self adjusts to atmospheric changes for easier starting, sharper throttle response and optimized power, and power stability when jumping/landing

• Ultra-fine atomizing injector with 12 holes sprays particles with a droplet size of 60μ for smooth power deliver and improved engine at partial throttle

• 43mm throttle body uses a progressive throttle linkage to deliver airflow in much the same way as an FCR carburetor. Using two linked shafts, the throttle body opens more quickly after reaching the 3/8 open position

• Lightweight throttle body is approximately half the weight of a FCR carburetor, saving over one pound in weight

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

Optimized Injector Angle

• Injector set at 45°, the optimum angle for improved mid-range power, which corresponds to the intake ports of the new head design and is an improved position compared to competing products

New ECU

• No battery needed, saving weight; the engine can be started with only three rotations of the crankshaft using the electricity generated by a single kick of the starter

• The system delivers electricity to FI system in sequence for quick starting: first the ECU, then the fuel pump, and finally the injector

• 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 built in to the ECU to help cope with the shocks and vibrations of motocross riding

New Lightweight Aluminum Fuel Pump

• Located in the fuel tank

• Features a rubber 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

• Fuel return hose from the pressure regulator helps ensure there is always fuel in the inlet port, preventing stalls due to fuel splashing and enabling riders to use all the fuel

• New 1.8 gallon fuel tank is lighter and formed using a rotational molding process

Improved Engine Performance

• 449cc liquid-cooled, DOHC, four-stroke single

• New piston with reshaped head increases compression ratio from 12.0 to 12.5:1 for improved low and mid range performance

• Low-friction coating on the piston skirt reduces mechanical loss

• Revised piston jet injects oil at a new angle for improved piston cooling

• Piston jet nozzle opening was improved to minimize oil gathering for a better contribution to piston cooling

• A forward lean angle of 3° puts the engine in the ideal position for maximum traction

• Tuned for a broad powerband with the torque curve set just under the wheel spin threshold

• High-acceleration cams help the engine rev quickly

• 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

• Maintenance free screw-type automatic cam chain adjuster

• Larger flap inside the airbox helps prevent the ingress of mud and water

New Top End

• Revised intake and exhaust ports for improved engine performance at all rpm

• Reduced cylinder head height from 105 to 100mm for a more compact, lighter engine

• Titanium 36mm intake and 31mm exhaust valves with aluminum spring retainers reduce reciprocating weight and cylinder height and help ensure reliable valve control at high rpm

• New high-strength material with finer metal grain for intake valves offers about a 50 percent greater resistance to fatigue

• Double valve springs allow a short cylinder head height and help ensure stable valve operation

• Dual overhead, lightweight camshafts lobes and tappet surfaces feature a soft-nitride surface treatment for long wear and high-rpm reliability

• Asymmetrical high-acceleration cams and the special coating on the intake ports yield high intake efficiency at all rpm

New Crankshaft Design

• Improved traction with increased rotational inertia via