Features 
Hard-hitting fuel-injected power
Fuel-injected 449 cm3 liquid-cooled, 4-stroke Single delivers hard-hitting power from low- through high-rpm. The broad powerband and responsive throttle offer a broad spread of torquey response that enables racers to get on the gas and go even from down low. In addition to the inherent benefits, fuel injection contributes to the KX450F’s lag-free acceleration, especially after landing jumps.
Battery-less fuel injection system
Designed specifically for motocrossers the fuel injection system incorporates a small lightweight ECU and operates without a battery to further eliminate unnecessary weight. And of course, fuel injection eliminates the need to adjust engine settings to suit track and climate conditions.
Lightweight fuel pump
Lightweight flat-bottom aluminium fuel pump is located in the plastic fuel tank. For ’11, the fuel pump mounting angle was rotated 55˚ to offer increased reliability.
To ensure a stable fuel supply during vigorous motocross riding the fuel pump features a rubber fuel filter cover that wraps around the inlet port and acts as a fuel trap. A fuel return hose from the pressure regulator ensures there is always fuel in the fuel trap.
To ensure a stable fuel supply during vigorous motocross riding the fuel pump features a rubber fuel filter cover that wraps around the inlet port and acts as a fuel trap. A fuel return hose from the pressure regulator ensures there is always fuel in the fuel trap.
KX450F Latest News
Xavier Boog confirmed for two more seasons with Kawasaki
Xavier Boog, already crowned MX1 French Champion two weeks ago and currently sixth in the MX1 World Championship, has been confirmed by Kawasaki as a factory rider for the next two seasons.
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