KX design philosophy is simple: put mid-level to expert riders on the top step of the podium – and that is what the KX450F does best. Engine and chassis performance delivers what riders need to win. And complimenting this dominant performance, the KX450F is loaded with advanced technology with industry firsts that give riders an even greater edge.
|Bore and stroke||96.0 x 62.1 mm|
|Valve system||DOHC, 4 valves|
|Fuel system||Digital fuel injection with 43 mm Keihin throttle body|
|Lubrication||Forced lubrication (semi-dry sump)|
|Front: type||Single semi-floating 270 mm petal disk|
|Front: calipers||Dual-piston caliper|
|Rear: type||Single 240 mm petal disc|
|Rear: calipers||Single-piston caliper|
|Overall length||2,195 mm|
|Overall width||820 mm (32.3 in.)|
|Overall height||1,290 mm|
|Ground clearance||345 mm|
|Seat height||960 mm|
|Curb mass**||108.7 kg|
|Fuel capacity||6.3 litres|
|Transmission||5-speed, constant mesh, return shift|
|Primary reduction ratio||2.727 (60/22)|
|Gear ratio: 1st||1.750 (28/16)|
|Gear ratio: 2nd||1.412 (24/17)|
|Gear ratio: 3rd||1.188 (19/16)|
|Gear ratio: 4th||1.000 (19/19)|
|Gear ratio: 5th||0.875 (21/24)|
|Final reduction ratio||3.846 (50/13)|
|Clutch||Wet multi-disc, manual|
|Wheel travel: front||310 mm|
|Tire: front||80/100-21 51M|
|Wheel travel: rear||315 mm (12.4 in.)|
|Tire: rear||120/80-19 63M|
|Steering angle (left/right)||42°/42°|
Launch Control Mode
In motocross racing, getting a good start is critical. A few tenths of a second can make the difference between getting the holeshot or not. In slippery conditions, getting the maximum drive from a motocrosser requires precise control of the both the clutch and throttle.
Launch Control Mode helps riders get a good start by complementing high-level technique with engine management. Featured on a mass-production motocrosser for the first time on Kawasaki's KX450F, the system activates a separate engine map designed to get a more efficient start off the line. The system is designed to the same specifications as that used by our factory racers competing in the AMA Supercross and Motocross championships.
Launch Control Mode is activated simply by pressing the button on the handlebar. The Launch Control map slightly retards ignition timing to help tame the engine's strong torque and reduce wheel spin off the start. Launch Control Mode is only active in the first two gears off the start, disengaging and returning to the standard engine map automatically once the rider shifts into 3rd gear. The system gives riders a great advantage when lining up at the gate and puts them in a better position to win.
Best kept secret
* The Manufacturer's Suggested Retail Price does not include freight, pre-delivery inspection or applicable taxes. The final price is at the discretion of the dealer. Prices and Specifications are subject to change without prior notice. The amount indicated as "Your price" may include an optional instant Mega Cash credit that is deducted from the manufacturer's suggested retail price before taxes. This promotion is time limited and certain conditions will apply. See your dealer for complete details. Offer not available on financed purchases and cannot be combined with any other special offers. The final price is at the discretion of the dealer. Prices and Specifications are subject to change without prior notice.
** Includes all necessary materials and fluids to operate correctly, full tank of fuel (more than 90% of capacity) and tool kit (if supplied)
‡ Power / Torque figures measured at the crankshaft.
The specifications mentioned here apply to and have been achieved by production models under standard operating conditions. We intend only to give a fair description of the vehicle and its performance capabilities but these specifications may not apply to every machine supplied for sale. Kawasaki Heavy Industries, Ltd. reserves the right to alter specifications without prior notice. Equipment illustrated and specifications may vary to meet individual markets. Available colours may vary by market.