This is due to the larger gas tank, 18 inch rear wheel, headlamp, and electric start, and a retuned engine that has less peak horsepower in favor of easier handling from more lower end torque delivered more smoothly.

Initial reviews of the KX450F were tepid, citing a positive response to the engine and power delivery, but finding the suspension and geometry of the bike unsatisfactory.

Reviewers also took exception to the choice of a 4-speed transmission, as Kawasaki chose to break from the industry standard by not to include a fifth gear.

Reviewers raved of the performance effect of the new injectors, and in proceeding years the technology would spread across the KX lineup.

It is activated by holding a switch until an indicator light glows green, at which point the bikes computer modifies acceleration factors.