European wins in addition to AMA Supercross Lites and Motocross Lites championships to its credit. To ensure the Lime Green racers continue to run at the front, Kawasaki engineers have made a number of engine and chassis changes to further increase the KX250F’s winning potential.
KEY FEATURES POWERFUL, HIGH-REVVING FUEL-INJECTED ENGINE Tuned to best suit race-experienced riders, the 249 cm3 liquid-cooled, 4-stroke single’s wide powerband focuses on high-rpm performance and extends way into the over-rev. Already featuring race-inspired tuning and parts like the high-performance piston with bridged-box bottom (a mass-production first when introduced on the 2010 KX250F), the 2011 engine receives fuel injection and a number of changes for even more power, stronger low-mid range torque (most noticeable when riding through the whoops, landing...
KEY FEATURES The revised intake ducting and new deep-protrusion spark plug not only offset the drop in low-mid torque that comes from a change to fuel injection, performance is actually improved in this range. Revised final reduction ratio offers improved engine feel. The shorter gearing (13/48T >>...
Factory KX Fi Calibration Kit (optional accessory) The KX Fi Calibration Kit is the same kit used by Kawasaki’s works teams and Team Green dealers in Europe and the U.S. The kit enables Team Green dealers, Kawasaki...
KEY FEATURES - accessing the ECU is accomplished simply by connecting to a PC via the ECU controller using a USB cable (no additional switches are necessary) - setting adjustments can be prepared in advance on a PC, or done when connected to the ECU - the kit’s user-interface is simple to understand and easy to use The KX Fi Calibration Kit contains seven preset settings that can be quickly and...
KEY FEATURES Both click-and-drag (using the graph window) and numerical editing (using the map sheet) are possible. When connected to the ECU, the KX Fi Calibration Kit can be used to display the status of a running engine. Information can be displayed in numeric form using the Data Monitor, or in visual form using the various display options offered by the Data Meter.
KEY FEATURES The KX Fi Calibration Kit can also be used as a data logger, recording up to six hours of data depending on the number of parameters (engine rpm, angle of throttle opening, etc) being recorded. After riding, the riding data can be viewed using the [Analyze] window.
KEY FEATURES Lightweight titanium valves (IN: 31 mm; EX: 25 mm) reduce reciprocating weight and offer high-rpm reliability. The ultra-light valves have extremely thin valve stems on par with those found in supersport machines. The intake valves feature thicker heads for increased strength and both intake and exhaust valves are formed from a highly rigid, titanium material.
KEY FEATURES HIGH-SPEED CHASSIS WITH FACTORY-STYLE COMPONENTS & TUNING The KX250F’s slim aluminium perimeter frame is a lightweight construction composed of forged, extruded and cast parts. Chassis balance and settings were all set to suit race-experienced riders. The centre of gravity and key dimensions (swingarm pivot, output sprocket and rear axle locations) were chosen so that the rear tyre would drive the bike forward (instead of causing it to squat).
KEY FEATURES The New Uni-Trak rear suspension system mounts the suspension arm below the swingarm, allowing a longer rear suspension stroke. The longer stroke in turn allows more precise rear suspension tuning. Extensive rider testing was conducted to determine the ideal linkage ratios and rear shock absorber damping settings to achieve maximum rear wheel traction.
KEY FEATURES Being able to use a larger damper piston not only enables smoother action and makes firm damping performance possible. (Illustration C) Removing the damper assembly from NEW the right fork tube frees up space for a preload adjuster. Having a preload adjuster greater simplifies the task of setting fork preload or front height.
KEY FEATURES SFF offers improved left/right balance, which greatly enhances handling. Locating the heavy spring in the right tube (and fine-tuning the left and right tube strength) better offsets the previously unbalanced weight of the brake caliper and disc on the left side.
KEY FEATURES The rear shock also features the Kashima Coat on the tank cylinder. The reduced friction smoothes suspension action. Factory-style and other race-oriented components Among the KX250F’s numerous factory-style components are its front and rear petal disc brakes. In addition to helping reduce unsprung weight, the wave shapes of the petal discs help clean the brake pads for more efficient braking performance.
KEY FEATURES Factory-style graphics complement the KX250F’s highly tuned performance. Rider interface Designed with rider ergonomics in mind, the bodywork components offer the rider a slim interface, the natural position makes it even easier for racers to go fast. Formed using a double-injection moulding process, 2-tone shrouds contribute to the slim package.
KEY FEATURES Revised pattern for the seat sides offers more grip than before. Seat urethane designed to keep the original shape longer. Wide (front-to-rear) footpegs designed to offer grip and superb feel at the pegs. The clutch cable boot features a large quick adjuster, making it easier for riders to adjust play in the clutch cable.
ADDITIONAL FEATURES Engine Electrofusion treatment on cylinder bore results in a surface with good 22 oil retention. Further, the molybdenum on the surface of the cylinder bore helps resist scorching, contributing to durability. Chassis The alloy swingarm uses a cast front section, tapered hydroformed spars and forged chain adjusters.
SPECIFICATIONS ENGINE Engine type Liquid-cooled, 4-stroke Single Displacement 249 cm³ Bore x stroke 77.0 x 53.6 mm Compression ratio 13.2:1 Valve/Induction system DOHC, 4 valves Fuel system Carburettor: Keihin FCR-MX37 Ignition Digital AC-CDI Starting Primary kick Lubrication Forced lubrication, semi-dry sump DRIVETRAIN Transmission 5-speed, return...
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 vary by market.