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New 2013 Kawasaki KX450F: from the AMA Supercross and Motocross experience to your garage
New 2013 Kawasaki KX450F: from the AMA Supercross and Motocross experience to your garage
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The jewel of Kawasaki in the catalog of motocross motorcycles for this next year is without a doubt the Kawasaki KX450F 2013, a motorcycle that accumulates all the experience acquired by the Japanese manufacturer in the American championships AMA of Supercross and Motocross where he has managed to get the title.

The powerful green crossera incorporates interesting new features such as the air spring front fork (PSF) of the latest generation, which makes it the first series motorcycle to equip a suspension of this type. Also, the motor has received light touch-ups as well as a ergonomics revised and adjustable to suit the pilot. Let's look at all these details in depth.

2013 Kawasaki KX450F: more powerful engine with multiple configurations

Kawasaki KX450F 2013

The 449 cc gasoline-injected engine of the Kawasaki KX450F 2013 It has been thoroughly revised in order to get more power. For this, the piston It is a new design with a clear inspiration in the competition model. A short skirt, reinforced external ribs and the use in series production of a bridge-shaped resistor box base, as well as its internal clamps, help to build a lighter and more powerful piston. The revised piston crown has been revised and is 0.2mm lower and has curved edges (rather than a tooth on the crown edge), which contributes to improved performance.

The intake cam has seen its lift reduced by 0.4 mm while the wedge-shaped crankshaft reinforcements increase the eccentricity of the moment and ensure a high crankshaft balance factor. This balancing factor becomes in the new Kawasaki KX450F 2013 up to 60% equal to that of its star rider's motorcycle Ryan Villopoto, This results in a decrease in engine vibrations, smoother power and increased performance, especially at low revs where the response is much more sudden.

The alternator, very important in motorcycles with kick start and electronic injection, it has also undergone modifications in order to improve the feel with partial throttle openings.

Kawasaki KX450F 2013: Output Control Mode and three possible injection maps

Kawasaki KX450F 2013

One of the biggest novelties that incorporates the Kawasaki KX450F 2013 is called Output Control Mode. Simply pressing a button for more than two seconds activates a separate ignition map that ensures an efficient start on slippery surfaces. Output Control Mode map delays ignition timing, allowing the wheels to grip better in low-traction situations. Output Control Mode operates in 1st and 2nd gear (and neutral). Once switched to 3a, the system automatically disarms and returns to the normal power-on map.

The new one ECU you have the possibility to choose between three power maps in addition to the Output Control Mode. Its initial settings are: standard, hard and soft (depending on the terrain conditions). To change from one to the other you just have to insert a DFI connector corresponding four-pin connector into the port to the right of the collector.

Furthermore, if the injection is to be parameterized in another way, the user can do so. You just have to get hold of the calibration kit (KX FI Calibration Kit) that allows you to vary all the parameters you want and thus adapt the motorcycle to your needs.

Kawasaki KX450F 2013: injection system without battery

Kawasaki KX450F 2013

Designed specifically for dirt bikes, the fuel injection system incorporates a compact and lightweight ECU that works without a battery, eliminating unnecessary weight. Only with the electricity generated by the kick start, the engine can be started with just three rotations of the crankshaft. The system supplies electricity in the following order: 1) ECU, 2) fuel pump, 3) injector. When the engine is warm, it can be started with a single pedal operation.

The 43mm throttle body uses progressive linkage to deliver airflow in much the same way as an FCR carburetor would. With two articulated axles, the throttle body opens faster after the

3/8 open position. The injector has been adjusted to 45º, in order to increase the power in the medium regimes.

Kawasaki KX450F 2013 - Air Spring Fork (PSF)

The Kawasaki KX450F 2013 It is the first motocross motorcycle to be equipped as standard with a air spring fork (PSF) manufactured by Kayaba and that dispenses with the main springs of each fork tube. Instead, they are replaced by air which contributes to the following benefits:

  • Lower weight (approximately 750 grams)
  • Easy maneuverability
  • Wide range of adjustment (by means of an adapter and a motorcycle pump with pressure gauge, the internal pressure can be changed)
  • Reduced friction (20% less than a spring fork)
  • Higher suspension compression (elimination of springs allows for twice the size of pistons)
  • Greater stability on the court (the air offers much less resistance in the extension movement)

To further improve outboard friction, the fork is coated on the outside of the tubes with extra hard carbon (DLC) that also minimizes scratches and tube damage. In addition, the anti-friction coating Kashima Coat on the inside of the outer tubes of the fork helps to soften the suspension (especially in the early part of its travel) and improve the feeling of riding.

The operation of the rear shock it has also been revised to work perfectly with the new front suspension. The new Uni-Trak rear suspension system mounts the suspension arm below the swingarm and allows more rear suspension travel. The longer travel allows, in turn, an adaptation of the rear suspension in a more precise way.

2013 Kawasaki KX450F - Adjustable Cockpit

Kawasaki KX450F 2013

The triple upper seatpost With two sets of handlebar mounting slots and reversible handlebar mounts it offers the rider four positions to choose from for the handlebar, which is now manufactured by Renthal: 25mm forward, 15mm forward, standard and 10mm rearward.

The adjustable footrest supports allow the rider to lower the footrest position by 5 mm. In the lowest position, the center of gravity drops, as does the pilot's point of view, giving both physical and psychological stability.

Kawasaki KX450F 2013

Using an optional rear suspension tie rod (1mm longer than normal), riders can lower the seat height about 4mm (measured at the center of the seat).

Finally, the front and rear brake They have lobed edges in order to reduce weight and improve the cleaning of the tablets. Both the front brake master cylinder and the pads are new in order to increase braking power.

Kawasaki KX450F 2013: racing aesthetics

Kawasaki KX450F 2013

The Kawasaki KX450F 2013 It incorporates a multitude of details similar to those of Kawasaki racing motorcycles. For example, the rear fender is white instead of green, the rims are coated in black alumite 1, and the fork stops and rear suspension adjuster are finished in blue alumite 1, as are the oil cap and the oil plugs. the two ports on the generator cover.

The clutch cover, as it wears out due to friction with the boots, presents a relief that appears progressively while the motor is finished in silver.

Kawasaki KX450F 2013

  • Motor:
    • Type: Liquid Cooled, 4T Single Cylinder
    • Displacement: 449 cm³
    • Power max. dec.: N.D. cv to rpm
    • Torque max. dec: N.D. Nm at rpm
  • Transmission:
    • Clutch: Oil bathed multi-disc
    • Change: 5 speeds
    • Transmission: Chain
  • Suspensions:
    • Front: 48mm AOS type inverted telescopic fork, air suspension (PSF), compression damping - 22 clicks; rebound damping: 20 clicks; 314mm of travel
    • Rear: New Uni-Trak; compression damping: 22 clicks (low speed), 2 or more turns (high speed); rebound damping: 33 clicks; Spring preload: Fully adjustable; 315mm of travel
  • Brakes:
    • Front: 250mm rigid mount single lobed disc. Double piston
    • Rear: 240mm single lobed disc. Single piston
  • Wheels:
    • Front: 80 / 100-21 51M
    • Rear: 120 / 80-19 63M
  • Dimensions:
    • Overall length: 2,180 mm
    • Wheelbase: 1,480 mm
    • Seat height: 955 mm
    • Fuel tank: 6.2 liters
    • Curb weight: 112.5 kg

See complete gallery »New Kawasaki KX450F 2013: from the AMA Supercross and Motocross experience to your garage (Action) (42 photos)

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