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Features

All

At A Glance - Massively powerful engine

At A Glance - Revised suspension settings

At A Glance - Improved shifting performance

At A Glance - Revised seat

At A Glance - Refined ECU settings

At A Glance - Easier fuel injection calibration system access

At A Glance - Still easy to start!

Engine Overview - 449cc liquid-cooled, DOHC, four-stroke single

Engine Overview - Bridged-box bottom piston design offers optimal engine performance

Engine Overview - Reinforced crankcase is strong and durable

Engine Overview - A forward lean angle of 3 degrees puts the engine in the ideal position for maximum traction

Engine Overview - Tuned for a broad powerband with the torque curve set just under the wheelspin threshold

Engine Overview - High-acceleration cams help the engine rev quickly

Engine Overview - Maintenance-free automatic cam chain adjuster

Engine Overview - 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

Bridged-Box Bottom Piston - Lighter and more durable than traditional piston designs

Bridged-Box Bottom Piston - Short piston skirt features low-friction coating for reduced mechanical losses

Bridged-Box Bottom Piston - Reinforced external ribs for strength and durability

Bridged-Box Bottom Piston - Revised profile with fully flush internal bracing results in a lighter, stronger piston

Bridged-Box Bottom Piston - Short piston pin offers increased strength

Cylinder Head - Compact head is only 100mm tall

Cylinder Head - 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

Cylinder Head - Double valve springs allow a short cylinder head height and help ensure stable valve operation

Cylinder Head - 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

Crankshaft - 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 - 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

Digital Fuel Injection - It is not necessary to re-tune, or change any jets to suit climatic conditions like on a carbureted model

Digital Fuel Injection - 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

Digital Fuel Injection - 43mm throttle body uses a progressive throttle linkage to deliver airflow in much the same way as an FCR carburetor

Digital Fuel Injection - Using two linked shafts, the throttle body opens more quickly after reaching the 3/8 open position

Digital Fuel Injection - Lightweight throttle body is approximately half the weight of a FCR carburetor, saving over one pound in weight

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

Digital Fuel Injection - 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

High Performance ECU - 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

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

High Performance ECU - Starting can be accomplished in a single kick

High Performance ECU - 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

Optional User ECU Setting Tool - 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

Lightweight Aluminum Fuel Pump - 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

Lightweight Aluminum Fuel Pump - 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

Easy Starting - 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

Easy Starting - 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

Efficient Cooling - Radiators don’t need reinforcing brackets, which results in lower overall weight

Efficient Cooling - Shrouds feature a slim design that melds with the radiators’ design

Efficient Cooling - 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

Strong and Durable Clutch - Excellent oil drainage contributes to more direct feel

Strong and Durable Clutch - Friction plates with substantial friction material contribute to a more direct feel

Strong and Durable Clutch - 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

Close-Ratio 5-Speed Transmission - Thinner inner-link chain is light and strong

Close-Ratio 5-Speed Transmission - 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

Exhaust - Optimized exhaust routing contributes to improved ergonomics

Exhaust - High-volume silencer helps meet noise regulations currently 94dB

Exhaust - Right side panel has special passageway to help cool the silencer

Powerful Disc Brakes - Rear brake pad material offers strong braking performance

Powerful Disc Brakes - Powerful twin-piston hydraulic front caliper

Powerful Disc Brakes - Lightweight semi-floating 250mm petal-type front brake rotor

Powerful Disc Brakes - Single piston hydraulic rear caliper squeezes lightweight 240mm petal-type rotor

Light, Slim Chassis - Revised engine mount brackets optimize frame rigidity for better handling

Light, Slim Chassis - Lightweight steering stem shaft contributes to light, nimble handling

Light, Slim Chassis - Main frame spars are 68mm tall and 24mm wide to provide an ideal balance between stiffness and compliance

Light, Slim Chassis - Weight-saving features include a slim head pipe, narrow cross-section and a downtube formed with a swaging (squeezing and hammering) process

Light, Slim Chassis - Swingarm pivot is located high in the frame to maximize rear wheel traction

Aluminum Swingarm - Cross-section design contributes to light handling

Aluminum Swingarm - Tapered “D” shape swingarm provides ideal rigidity for excellent stability, and is lighter than a comparable box-section unit

Aluminum Swingarm - Alloy swingarm features a cast front section, tapered hydroformed spars and forged chain adjusters

Aluminum Swingarm - Uni-Trak® rear suspension linkage ratio maximizes rear traction performance

Aluminum Swingarm - 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

Front Fork - Revised damping settings offer improved action and increased comfort during the initial phase of the suspension stroke

Front Fork - 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

Front Fork - 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

Front Fork - 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

Front Fork - 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 Shock - Rear suspension settings and linkage ratios derived from extensive rider testing

Rear Shock - Kayaba rear shock features a large 50mm piston

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

Rear Shock - Also features Kashima Coat treatment on the cylinder for reduced friction and smoother suspension action

Rear Shock - Easy adjuster access for track-side suspension tuning

Rider Interface and Styling - Dual injected two-tone, one-piece plastic shrouds and side number plates

Rider Interface and Styling - Optimized exhaust routing contributes to improved ergonomics

Rider Interface and Styling - Right side panel has special passageway to help cool the silencer

Rider Interface and Styling - Black plastic covers, triple clamps, engine covers, and black alumite-coated rims – just like Kawasaki’s factory teams

Rider Interface and Styling - Wide 50mm footpegs provide excellent feel and a comfortable platform

Rider Interface and Styling - Frame is wider at the ankles to offer optimum grip, narrows below the seat to allow a slim riding position

Rider Interface and Styling - Slim seat design uses firmer urethane foam that keeps its original shape longer for the best possible ergonomics and feel

Rider Interface and Styling - 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

Additional Features - Clutch cable boot features a large quick adjuster, making it easy for riders to adjust play in the clutch cable on the fly

Additional Features - Increased front axle collar diameter transmits more feedback from the contact patch to the rider

Additional Features - Ribless rear hub and butted spokes offer light weight and excellent durability

Additional Features - Rear caliper guard helps protect the caliper from damage

Specifications

Photos

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While we attempt to ensure display of current and accurate data, this listing may not reflect the most recent transactions or may reflect occasional data entry errors. All inventory listed is subject to availability and prior sale. Please consult dealership personnel for details. Prices are quoted for the US only and may not include dealer preparation, transportation, taxes, or other applicable charges. Photographs may be representative only and may vary somewhat from the actual items offered for sale.

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