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|WITH MORE SUPERCROSS AND PRO MOTOCROSS WINS THAN ALL OTHER OEMS COMBINED, NO ONE ELSE COMES CLOSE TO THE CHAMPIONSHIP-WINNING POWER OF THE KAWASAKI KX™250F MOTORCYCLE. THE BIKE THAT BUILDS CHAMPIONS.|
|Bore and stroke||77.0 x 53.6 mm|
|Valve system||DOHC, 4 valves|
|Fuel system||Fuel injection: ø43 mm x 1 (Keihin) with|
|Lubrication||Forced lubrication (semi-dry sump)|
|Front: type||Single semi-floating 270 mm petal disc|
|Front: calipers||Dual-piston caliper|
|Rear: type||Single 240 mm petal disc|
|Rear: calipers||Single-piston caliper|
|Overall length||2,170 mm (85.4 in.)|
|Overall width||825 mm (32.5 in.)|
|Overall height||1,270 mm|
|Wheelbase||1,478 mm (58.1 in.)|
|Ground clearance||324 mm|
|Seat height||945 mm|
|Curb mass**||104.5 kg|
|Fuel capacity||6.4 litres|
|Transmission||5-speed, constant mesh, return shift|
|Primary reduction ratio||3.350 (67/20)|
|Gear ratio: 1st||2.142 (30/14)|
|Gear ratio: 2nd||1.750 (28/16)|
|Gear ratio: 3rd||1.444 (26/18)|
|Gear ratio: 4th||1.235 (21/17)|
|Gear ratio: 5th||1.045 (23/22)|
|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||310 mm (12.2 in.)|
|Tire: rear||100/90-19 57M|
|Trail||123 mm (4.8 in.)|
|Steering angle (left/right)||42° / 42°|
|Suspension, front||48 mm inverted Separate Function front Fork (SFF) Type 2 with 22-position compression, 20-position rebound damping and 40-position spring preload|
|Suspension, rear||Uni-Trak linkage system shock with 19-way low-speed and 4-turn high-speed compression damping, 22-way rebound damping and fully adjustable spring preload|
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.
Kawasaki’s KX250F was the first mass-production motocrosser to feature Dual Injectors. One injector is located downstream of the throttle valve, where injectors are located on standard FI systems, and a second is located upstream of the throttle valve, close to the airbox. The two injectors split their roles: operating at different rpm ranges, they ensure both smooth, instant response at low-rpm and high peak power at high-rpm.
For cases that call for low-rpm operation like instantaneous acceleration off the start and precise control when cornering, primary operation falls to the downstream injector. Because it is positioned close to the combustion chamber, sprayed fuel can be supplied to the engine quickly, resulting in sharp response. Conversely, when high power is the priority, primary operation switches to the upstream injector, which focuses on high-rpm applications. Its location farther away from the combustion chamber means that the fuel has a longer travel time. This allows more time for the fuel particles and air to mix, as well as allowing the mixture to cool and condense. This means that when more power is needed, the cylinder can be filled with a greater quantity of high-quality mixture.
*Adjustable parts and their range of adjustability vary by model.
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Minimum amount to finance of $9,000 after certain conditions apply.
Keep cool in the shade between races. Purchase a select new KX450 or KX250, and receive a free Kawasaki Pit Tent, Matrix R2 Rubber Mat, and Matrix M64 Elite Racing Stand. Visit your local Kawasaki dealership to access this limited time offer.