Some say Motorsport?
In the 450cc motocross game, the only thing that matters for serious runners is the performance leader and run forward. And 2011, the best tool for the job is once again a lime - Kawasaki KX ™ 450F redesigned and revised. This field can not be still, technically, so Kawasaki engineers analyzed all the system components and the winner of the race and the 2010 model comes with a multitude of settings in red, blue question, orange and yellow I hit.
The last open class begins with the main parties allowed KX KX 2010 to win more events than any other bike Supercross last year - a brutal fast 449cc four-stroke DOHC single packaging of a wide range of energy located in a frame light and strong aluminum attached to a suspension designed to provide compliance, high-speed stability and performance of Whoop-sucking all the bike a long time. It was an ideal platform in which to win the most races in 2010 and this trend promises to continue the review, even faster 2011 model.
Last year, the KX450F engine found in many improvements, including the use of bridged-box first production piston down (the most high-end power and better features than-REV), revised cam timing for better performance in the medium and high speed, and reinforced crankcase and the cylinder sleeve for longer life.
This year, there's more. The bridge in the box below the piston, for example, was modified to merge with the update, loud muffler, which is quieter than the unit last year. The ECU has been modified to provide a hotter spark and longer for a better response at low revs. The shift mechanism includes a wide array of change and strong internal tension spring for more positive change. Finally, the fuel injection system software calibration kit has been updated, while the harness and the controller have been modified for easier use.
Changes in the chassis department are equally impressive, and show the results for our race team on development. First, there are revisions to the mounting of the engine to optimize the chassis flex and improve handling. Next, the engineers revised damping adjustment fork tubes in a solid performance even better. For a touch of cycling plant also is anodized blue adjuster compression damping of the PAC, rather than the silver last year. Damping parameters of the rear suspension have also been revised, and also receives a blue anodised compression settings. The seat has a new part of the surface texture for better grip of any pilot on board and guide the chain of transmission has been fully reinforced for durability, the analysis shows that nearly three times as strong as the unit of As for a machine in 2010.
The race-ready engine is compact and lightweight, with a cylinder head and a short compression ratio of 12.5:1 100 mm. A wedge-shaped crank web offsets 60 percent of the weight of the crankshaft of the piston, producing a "counterweight" effect. This is on par with Kawasaki's factory riders and helps reduce engine vibration, smoother power delivery and better throttle response at low revs. A stainless steel hose connects to the muffler checked using the packaging material with long fibers to maximize service intervals. A necklace of rubber on the rear damper mounting provides improved long-term sustainability silence. The Digital KX450F fuel injection (DFI ®) is automatically adjusted to suit track and climate conditions and offers stable fuel-metering even when landing the difficult jump motocross. The system has a compact and light equipment DFI, a throttle body 43 mm, aluminum fuel pump light and ultra-fine nozzle.
In a 45-degree angle for ideal mid-range power, the injection of aerosols requires 10 holes, the fuel particles 60 microns for smooth power delivery and precise engine response across the range regime.
Designed specifically for motocross, making it easy KX450F DFI system requires no battery, the engine can be started within three rotations of the crankshaft, using only electricity produced by the initial stroke kickstart.
An adjustment tool allows passengers the option of ECU ECU choose from several different data cards, or refine a personalized card that changes in the fuel injection and ignition timing according to the different tracks and conditions. The tool can also be used as a data logger, recording up to six hours of data, including engine speed, the degree of throttle opening, engine thrust, coolant temperature and air, ignition, adjustment of the position of fuel switching, and system voltage.
Phenomenal power of the engine passes through the switch that offers ultra-light disc is a magnificent job in the oil drain hose and the clutch plates muscle. The whole assembly is designed to provide exceptional sensitivity and durability of the switch. The chain has an internal link thinner and a little 'weight saving compared to typical models will help to increase the acceleration. The revised suspension settings damping to offer lighter handling, the suspension of the improved performance, greater comfort and cushioning while jumping.
2011 KX450F, the D-shaped aluminum swingarm features a thin section of ribs and thin walls. It turns out high-aluminum frame to maximize the traction of the rear wheel. Mounting Arm Uni-Trak ® rear suspension link arm in the rear suspension offers a long stroke, and facilitate the fine tuning shocks.
Complementing the chassis responds Kayaba Air-Oil-independent (AOS) fork that offers precise cornering and precise handling. The holder has a diamond-like carbon (DLC) coating on the outer surface of the inner fork tubes to reduce stiction when the fork is exposed to lateral forces that limit the action of other slides. The result is a smooth, accurate response, especially on curves. General measure of suspension is extremely soft with a treatment that reduces friction Kashima Coat on the inside surfaces of the fork tubes and the tank of a rear impact. Fork guards shell provides excellent protection for cursors.
The shock of the 2011 KX450F revised Kayaba rear damper settings help control wheel and an improved performance impact when landing jumps. It features a large 50 mm piston and Kashima Coat treatment on the inner workings of shock to help maintain the feeling of filling through the toughest motorcycle. Double compression adjusters allow easy access to the amortization of high and low speed to be tuned separately, giving the mechanics and pilots the ability to easily adjust the fine suspension of track conditions difficult.
A compact design firm urethane foam seat and an upper lateral surface slip grip provides more sitting and standing, maintaining excellent rider mobility. The frame echoes the slim profile at the top, but widens at the bottom of the ankles to give the driver a better feel and control. Fill in the interface are larger than 50 mm driver footrests that offer tenacious grip and a comfortable platform.
The 2011 KX450F is available in Kawasaki lime green with black graphics on coated rims and aggressive alumite for a look at the factory.
Drivers who drive their KX450F at events are eligible for Team Green ™, Kawasaki's amateur racing support program. Yearly Team Green provides regional support vehicles and highly qualified technicians, with over 100 events in the United States, which provides technical information and assistance to those who race Kawasaki products. Kawasaki also offers a contingency plan for a program of amateur and professional riders, who are good at designated events.
Kawasaki KX 450F Models
Main Details And Features
At a glance…
- Massively powerful engine
- Revised suspension settings
- Improved shifting performance
- Revised seat
- Refined ECU settings
- Easier fuel injection calibration system access
- Still easy to start!
Engine Overview
- 449cc liquid-cooled, DOHC, four-stroke single
- Bridged-box bottom piston design offers optimal engine performance
- Reinforced crankcase is strong and durable
- A forward lean angle of 3 degrees puts the engine in the ideal position for maximum traction
- Tuned for a broad powerband with the torque curve set just under the wheelspin threshold
- High-acceleration cams help the engine rev quickly
- Maintenance-free automatic cam chain adjuster
- Large airbox flap helps prevent mud and water from entering
Bridged-box Bottom Piston
- Same design as used on our factory racers; offers improved performance at all rpm
- Lighter and more durable than traditional piston designs
- Short piston skirt features low-friction coating for reduced mechanical losses
- Reinforced external ribs for strength and durability
- Revised profile with fully flush internal bracing results in a lighter, stronger piston
- Short piston pin offers increased strength
Cylinder Head
- Compact head is only 100mm tall
- 36mm titanium intake and 31mm exhaust valves with aluminum spring retainers minimize reciprocating weight and cylinder height to help ensure reliable valve control at high rpm
- Double valve springs allow a short cylinder head height and help ensure stable valve operation
- Camshafts, lobes and tappet surfaces feature a soft-nitride treatment for long wear and high-rpm reliability
Crankshaft
- Crankshaft with high inertial mass helps maximize rear wheel traction
- Wedge-shaped crank web provides enough offsetting moment for a 60 percent balance factor – and is similar to the crank balance in Kawasaki’s factory race engines, resulting in reduced engine vibration, smoother power delivery and increased performance, with a noticeably snappier response at low rpm
- Crankshaft and connecting rod feature a special carburizing and quenching treatment to maximize rigidity
Digital Fuel Injection
- Self-adjusts to atmospheric changes for easier starting, sharper throttle response and optimized power and stability when jumping/landing
- It is not necessary to re-tune, or change any jets to suit climatic conditions like on a carbureted model
- Ultra-fine atomizing injector with 10 holes sprays particles with a droplet size of 60 microns for smooth power delivery and engine response throughout the throttle range
- 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
- Fuel injector set at 45 degrees, the optimum angle for mid-range power
High-performance ECU
- New ECU programming and revised settings offer improved response at low-to-mid rpm
- No battery needed; 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: first the ECU, then the fuel pump, and finally the injector for quick, easy starting
- Starting can be accomplished in a single kick
- 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 motocross riding
Optional User ECU Setting Tool
- Allows racers to reprogram the ECU’s data maps for volume of fuel injected and ignition timing to alter engine characteristics to suit rider preferences
- The tool 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
Lightweight Aluminum Fuel Pump
- Located in the fuel tank but at a new angle to help prevent damage in extremely rough riding conditions
- 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
- 1.9-gallon fuel tank is formed using a rotational molding process
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 1.0mm of valve lift, to minimize the required kicking power
Efficient Cooling
- High-capacity Denso radiators feature tightly packed cores and a fin design that delivers superior cooling efficiency
- Radiators don’t need reinforcing brackets, which results in lower overall weight
- Shrouds feature a slim design that melds with the radiators’ design
- Radiator louvers feature four 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
- Excellent oil drainage contributes to more direct feel
- Friction plates with substantial friction material contribute to a more direct feel
- Large operating plate pusher reduces the clearance between the pusher and the input shaft hole, improving clutch operation
Close-ratio 5-speed Transmission
- 5-speed transmission and low-rpm engine response combination offers riders more gear options for traversing rough sections or getting into the rhythm of a course easily so they can focus more on racing
- Thinner inner-link chain is light and strong
- Sprocket-style chain drive roller reduces the effect of driveline lash, helping smooth engine braking and facilitating additional corner entry control
Exhaust
- Short, one-piece stainless steel exhaust pipe contributes to optimum mid-high rpm performance
- Optimized exhaust routing contributes to improved ergonomics
- High-volume silencer helps meet noise regulations
- currently 94dB
- Right side panel has special passageway to help cool the silencer
Powerful Disc Brakes
- Rear brake pad material offers strong braking performance
- Powerful twin-piston hydraulic front caliper
- Lightweight semi-floating 250mm petal-type front brake rotor
- Single piston hydraulic rear caliper squeezes lightweight 240mm petal-type rotor
Light, Slim Chassis
- Revised engine mount brackets optimize frame rigidity for better handling
- Lightweight steering stem shaft contributes to light, nimble handling
- Main frame spars are 68mm tall and 24mm wide to provide an ideal balance between stiffness and compliance
- Weight-saving features include a slim head pipe, narrow cross-section and a downtube formed with a swaging (squeezing and hammering) process
- Swingarm pivot is located high in the frame to maximize rear wheel traction
Aluminum Swingarm
- Cross-section design contributes to light handling
- Tapered “D” shape swingarm provides ideal rigidity for excellent stability, and is lighter than a comparable box-section unit
- Alloy swingarm features a cast front section, tapered hydroformed spars and forged chain adjusters
- Uni-Trak® rear suspension linkage ratio maximizes rear traction performance
- Suspension arm is mounted below the swingarm to allow a longer rear suspension stroke and more precise tuning
Front Fork
- Race-oriented suspension settings offer maximum overall performance
- Revised damping settings offer improved action and increased comfort during the initial phase of the suspension stroke
- Kayaba Air-Oil-Separate (AOS) fork keeps oil and air in separate chambers for stable damping performance during long motos. Low-friction fork seals contribute to smooth action
- 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) and a superb ride feel
- Wrap-around fork tube guards offer effective protection for the sliders
Rear Shock
- New damping settings contribute to increased stability and improved impact performance when landing from jumps
- Rear suspension settings and linkage ratios derived from extensive rider testing
- Kayaba rear shock features a large 50mm piston
- Rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately
- Also features Kashima Coat treatment on the cylinder for reduced friction and smoother suspension action
- Easy adjuster access for track-side suspension tuning
Rider Interface and Styling
- Dual injected two-tone, one-piece plastic shrouds and side number plates
- Optimized exhaust routing contributes to improved ergonomics
- Right side panel has special passageway to help cool the silencer
- Black plastic covers, triple clamps, engine covers, and black alumite-coated rims – just like Kawasaki’s factory teams
- Wide 50mm footpegs provide excellent feel and a comfortable platform
- Frame is wider at the ankles to offer optimum grip, narrows below the seat to allow a slim riding position
- Slim seat design uses firmer urethane foam that keeps its original shape longer for the best possible ergonomics and feel
- Seat has a slip-resistant top surface for good grip when seated and a new material along the sides for extra grip when standing
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 play in the clutch cable on the fly
- Increased front axle collar diameter transmits more feedback from the contact patch to the rider
- Ribless rear hub and butted spokes offer light weight and excellent durability
- Rear caliper guard helps protect the caliper from damage
Kawasaki KX 450F 2011 - U.S.
Specifications MSRP: $ 8149 ENGINE
Engine: Liquid-cooled, four-stroke single with DOHC and four-valve cylinder head
Displacement: 449cc
Bore x stroke: 96.0 x 62.1mm
Compression ratio: 12.5: 1
Fuel System: 43mm Keihin throttle body
Ignition: Digital DC-CDI
Transmission: Five-speed
Rake / trail: 26.7 degrees / 4.6 in.
Front suspension / wheel travel: Uni-Trak® linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression damping, 33-position rebound dampening and fully adjustable spring preload / 12.4 in.
Rear suspension / wheel travel: Uni-Trak® linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression dampening, 33-position rebound dampening and fully adjustable spring preload / 12.4 in.
Front tire size: 90/100-21
Rear tire size: 120/80-19
Front brakes: Single semi-floating 250mm petal disc with dual piston caliper
Rear brakes: Single 240mm petal disc with single-piston caliper
Overall length: 86.0 in.
Overall width: 32.3 in.
Overall height: 50.4 in.
Wheelbase: 58.3 in.
Ground clearance: 13.2 in
Seat height: 37.8 in.
Curb weight: 249.9 lbs.
Fuel capacity: 1.9 gal.
Color Choices: Lime Green
2011 Kawasaki KX 450F
Canada Specifications MSRP: $TBA CDN
ENGINE
Type Liquid-cooled, 4-stroke Single
Displacement 449 cc
Bore and Stroke 96.0 x 62.1 mm
Compression Ratio 12.5:1
Valve System DOHC, 4 valves
Fuel System Fuel Injection: ΓΈ 43 mm x 1 (Keihin)
Ignition Digital DC-CDI
Starting Primary Kick
Lubrication Forced lubrication, Semi-dry sump
DRIVETRAIN
Transmission 5-speed, return
Final Drive Chain
Primary Reduction Ratio 2.727 (60/22)
Gear Ratios: 1st 1.750 (28/16)
2nd 1.412 (24/17)
3rd 1.188 (19/16)
4th 1.000 (19/19)
5th 0.875 (21/24)
Final Reduction Ratio 3.846 (50/13)
Clutch Wet multi-disc, manual
FRAME
Type Perimeter, Aluminum
Wheel Travel: Front 315 mm
Wheel Travel: Rear 315 mm
Tire: Front 90/100-21 57M
Tire: Rear 120/80-19 63M
Caster (Rake) 26.7°
Trail 116 mm
Steering Angle (Left/Right) 42°/42°
SUSPENSION
Front: Type 48 mm inverted AOS-type telescopic fork
Compression Damping 22-way
Rebound Damping 20-way
Rear: Type New Uni-Trak
Compression Damping 22-way (low-speed), 2-turns or more (high-speed)
Rebound Damping 22-way
Spring Preload Fully Adjustable
BRAKES
Front: Type Single semi-floating, 250 mm petal disc
Caliper Dual-piston
Rear: Type Single 240 mm petal disc
Caliper Single-piston
DIMENSIONS
Overall Length 2,185 mm (86 in.)
Overall Width 820 mm (32.3 in.)
Overall Height 1,280 mm (50.4 in.)
Wheelbase 1,480 mm (58.3 in.)
Ground Clearance 335 mm (13.2 in.)
Seat Height 960 mm (37.8 in.)
Curb Mass 113.4 kg (250 lbs.)
Fuel Capacity 7 litres (1.54 gal.)
DETAILS
MSRP* TBA
Colours Lime Green
Manufacturers suggested retail price not include freight, PDI or taxes. The exchange rate is at the discretion of the distributor. Prices and specifications are subject to change without notice.
They are mentioned here apply to and have reached the production of models, the standard conditions of use. We intend only to give a good description of the vehicle and its performance, but these requirements do not apply to any machine for sale. Kawasaki Heavy Industries, Ltd. reserves the right to change specifications without notice. Equipment illustrated and specifications may vary to meet individual markets. Available colors may vary depending on the market.
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