Page 184 of Kawasaki Motorcycles by Kawasaki USA

The secret to winning races is traction; the combination of usable torque and a good rear suspension set-up. We tuned the engine so that the torque curve follows the limit of running resistance for as long as possible. Unchecked, engine torque can exceed this limit, resulting in wheel spin, which does nothing to help your forward momentum. When we first started developing the new aluminum perimeter frame, we set the centre of gravity and key chassis dimensions (swingarm pivot, output sprocket and rear axle locations) so that the rear tire would drive the bike forward instead of causing it to squat. The engine itself has a very upright orientation, which helps with mass centralisation. With years of experience designing high-tensile steel perimeter frames for our KX racers, we combined this know-how with the latest technology to design an all-new aluminum perimeter frame like that of the KX450F. The slim frame is composed of a combination of forged, extruded and cast parts. Once we determined the best balance of torsional and longitudinal rigidity for high-level riding, we added premium front and rear suspension components. The handling characteristics from the basic chassis and the settings we have chosen were selected to allow fast riders to ride faster. But we did not stop there. We added a number of works-style components, like highperformance petal disc brakes and a Renthal handlebar. Even the bodywork is purpose-built to put the rider in a position to ride fast not just in bursts, but for the entire race distance. KEY POINTS Race-oriented Engine Characteristics 249 cm 3 liquid-cooled, 4-stroke Single tuned for high-rpm performance and high reliability. Superior Rear Wheel Traction chassis dimensions (set for anti-squat) that maximise the wide spread of available torque, and rear suspension link ratios and shock damping settings determined from extensive rider testing result in superb rear wheel traction. Race-oriented Chassis Balance and Settings all-new aluminum frame, suspension settings set to suit high-level riders, petal disc brakes, numerous works-style components.

[close]