Ultra-powerful 449cc Liquid-cooled, Four-stroke Single449cc liquid-cooled, four-stroke single with four valves
Features superb low and mid-range power delivery
Linear power curve offers plenty of over-rev, for maximum flexibility in choosing shift points
Cam lift and timing boost low-and mid-range torque
Camshaft lobes and tappets feature a soft-nitride surface treatment for long wear and high-rpm reliability
Hand-finished surfaces of the polished intake ports improve intake efficiency at all rpm
Lightweight 36mm titanium intake valves and aluminum valve retainers reduce reciprocating weight for reliable valve control at high rpm
30mm steel exhaust valves for improved durability
Double valve springs help ensure stable valve operation
Screw-type automatic cam chain tensioner with oil pressure spring
Low-friction coating on piston skirt
Extra flywheel mass provides ultra-smooth engine power delivery
Crankshaft and connecting rod are sintered for additional rigidity
Crankshaft, rotor mass centralization, oil circulation, and ignition timing designed for ideal engine braking characteristics
ExhaustLarge 41mm titanium exhaust header for maximum power
Tapered exhaust pipe joint helps increase ultra-low rpm power.
Titanium exhaust pipe heat shield
Silencer uses long-fiber packing for lower maintenance
CoolingHigh-capacity Denso radiators deliver superior cooling efficiency
A reservoir tank is fitted to the radiator, for efficient cooling during long enduros
Slim radiators feature tightly packed cores and fins designed to enhanced heat dispersion
The radiator shroud design is optimised for a seated position
Electric StartingHigh-capacity starter motor is compact, yet offers high-output to help ensure quick and reliable starts under all conditions
Lightweight battery is located under the seat and behind the airbox for optimum mass centralization
Having both electric and kick starters means the KLX450R can be quickly restarted if the engine stalls during an event
Features highly reliable auto-decompression system; the dual-weight centrifugal decompression system fitted to the exhaust cam eases starting, and its simple construction helps to ensure reliability
Wide-Ratio Five-Speed TransmissionFeatures ratios selected="true"="true"="true"="true" specially for off-road racing
The transmissions gears are designed for high durability
Ball bearing shift lever for smoother shifting
Ratchet-type shift mechanism for smoother shifting and a more positive feel
FrameLightweight all-aluminum perimeter frame is a composite structure comprising forged, extruded and cast components
Slim frame profile, two-piece radiator shrouds, and careful bodywork design make the KLX450R feel light and narrow beneath the rider
Aluminum skid plate
Front SuspensionFork tuning is optimized for light, easy handling characteristics
Kayaba AOS (Air-Oil-Separate) fork keeps oil and air in separate chambers for stable damping performance during long rides
Large front fork damper cartridges offer a more progressive and plush action
Low-friction fork seals help reduce stiction
Rear SuspensionUni-Trak® rear suspension system mounts the suspension arm below the swingarm, allowing a longer rear suspension stroke.
Rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately
Alloy swingarm uses cast front section, tapered hydroformed spars and forged chain pullers; the tapered spars are shaped to match the balance of flex and rigidity required of the aluminum frame
Sprocket style chain roller reduces drive lash
BrakesPetal brake discs front and rear, help reduce unsprung weight and clean the brake pads for more efficient braking performance
18 Rear WheelDurable 18 rear wheel allows fitment of a wide selection of off-road tires
From the CockpitRenthal aluminum handlebars are standard
Lightweight short-length grips feature a special pattern to reduce vibration transmitted from the bars to the rider
Seat is wider than the KX450Fs for additional comfort during long enduros
Seat uses a slip-resistant top surface for good grip when seated and smooth sides for excellent rider mobility
Off-Road Racing EquipmentLightweight digital instrumentation includes a speedometer, twin tripmeter, odometer and clock
Lightweight 2.1 gallon fuel tank is constructed to meet strict U.S. environmental regulations
Gas tank petcock is fitted with a reserve pickup
Compact lighting package includes a 35 W headlight with lightweight plastic lens
Ultra-compact and energy efficient LED tail light
Two-piece construction of the left-side cover with a special door for easy access to the air filter
Engine guards protect both sides of the engine
Includes an aluminum skid plate for added protection from rocks and ledges
Sealed chain and a side stand are fitted as standard equipment
California models feature a secondary air system to enable them to meet strict emissions regulations
SpecificationsEngine Type: Four-stroke, DOHC, four-valve single
Displacement: 449 cc
Bore & Stroke: 96.0 x 62.1 mm
Compression Ratio: 12.0:1
Carburetor: Keihin FCR40
Ignition: Digital AC-CDI
Starting: Electric, with primary kick backup
Transmission: Wide-ratio five-speed
Final Drive: Sealed chain
Frame: Aluminum, perimeter design
Rake/Trail: 27.1/4.6 in.
Front Tire Size: 80/100-21
Rear Tire Size: 110/100-18
Front Suspension / wheel travel: 48mm inverted AOS-type cartridge fork with 22-way compression damping and 20-way rebound damping / 11.2 in.
Rear Suspension / wheel travel: UNI-TRAK® single shock system with 22-way low-speed, two-turn variable high-speed compression damping and 22-way rebound damping / 11.0 in.
Wheelbase: 58.3 in.
Front Brake Type: 250mm petal rotor with hydraulic dual-piston caliper
Rear Brake Type: 240mm petal disc with hydraulic single-piston caliper
Fuel Tank Capacity: 2.1 gal.
Ground Clearance: 12.6 in.
Seat Height: 37.0 in.
Curb Weight: 277.7 lbs.
Overall Length: 85.8 in.
Overall Width: 32.3 in.
Overall Height: 49.4 in.
Color : Lime Green
Warranty : 6 months
Good Times™ Protection Plan: 12, 24 or 36 months