Home Bike Review Kawasaki KX450F

Kawasaki KX450F

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The race-winning power and confident handling of Kawasaki’s KX™450F motocrosser are back in an even sleeker and more advanced package than ever before. With racing always at the forefront, the KX450F’s latest technical innovations were developed from the factory know-how of the Monster Energy Kawasaki race team, with the final product representing an unmatched combination of cutting-edge innovation and race-proven components. Its best-in-class performance is facilitated by the highest level of rider adjustability and the most progressive electronics package ever seen on a production motocrosser. From the moment the gate drops, the 2012 KX450F is set to leave challengers in its dust.

The 2012 highlights begin with the Supercross-winning DNA of last year’s bike. The advanced design of the aluminum perimeter frame and dominating motor receive a host of refinements to create a more compact and mass-centralized chassis propelled by more usable power than ever. Headlining the technological charge, the KX450F features an all new Launch Control Mode, which is tuned to maximize traction out of the starting gate. This is accomplished without sacrificing any of the mid-range grunt or straight-line speed that made the KX450F famous.

2012 KX450F riders can easily activate the new Launch Control mode – a key feature never before seen on a production motocross bike. The push-button system is activated by a touch of the switch on the left handlebar, and optimizes off-the-line acceleration by altering ignition timing in first and second gears to help maximize grip and reduce the chance of excessive wheelspin. Shifting into third gear automatically deactivates Launch Control Mode and returns the ignition timing to the parameters of the installed ignition map. The Launch Control’s effectiveness is further enhanced by a chassis designed to maximize suspension performance and rear wheel traction.

No other production motocrosser offers a higher degree of adjustability to the rider interface or engine character than the new 2012 KX450F. With a choice of four different handlebar positions, two footpeg positions, and virtually unlimited ignition mapping capabilities – thanks to its advanced Digital Fuel Injection (DFI®) system – the KX450F is uniquely able to adapt to changing track and surface conditions and meet the needs of a surprisingly wide range of riders.

The DFI system comes with pre-programmed ignition maps, but new for 2012, these maps are interchangeable without the use of a laptop computer – or other separate electronic devices, even the computers use it for video games with sites where you can get your boost now for games as Overwatch. Maps can quickly and easily be changed between three settings – standard, hard (conditions) and soft (conditions) – by swapping the DFI wire coupler cap clipped to the side of the steering head. No additional accessories are needed to alternate between preprogrammed settings – simply install the coupler cap with your desired ignition mode and start winning. The ECU is also still fully re-programmable by using the accessory KX FI Calibration Kit, the same tool used by Kawasaki factory and privateer teams in AMA and FIM racing.

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
26.9 degrees / 4.4 in.

Front tire size
80/100-21
Rear tire size
120/80-19
Front brakes
Single 250mm petal disc with dual piston caliper
Rear brakes
Single 240mm petal disc with single-piston caliper
Overall length
85.8 in.
Overall width
32.3 in.
Overall height
50.2 in.
Wheelbase
58.3 in.
Ground clearance
13.0 in
Seat height
37.6 in.
Curb weight
249.1 lbs.
Fuel capacity
1.64 gal.

Color Choices
Lime Green

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