274 Parramatta Road, Granville NSW 2142

Lighter, Faster 250 Motocrosser

The KX design philosophy – to put midlevel to expert riders on the top step of the podium – has not changed since the brand was launched over 40 years ago. The KX250F has a history of winning: in the extremely competitive 4-stroke 250cc class it is the racer with the most AMA Supercross and Motocross titles. Adding to its highly acclaimed engine and chassis performance, numerous industry firsts and advanced technology, the 2017 model offers a more powerful engine, a significantly lighter chassis, and slimmer ergonomics, making the new model the fastest KX250F yet. The new model gets around the track 1.6 seconds quicker* than its predecessor. *Kawasaki test rider on a 1’55s-lap course.

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Podium Winning

The KX design philosophy - to put mid-level to expert riders in the top step of the podium - has not changed since the brand was launched over 40 years ago. The KX250F is perhaps the motocross bike to put you out the front of the pack and keep you there.

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Advanced Suspension Technology

he KX250F was the first mass-production motocrosser to feature Showa’s Separate Function front Fork (SFF), which separates damping and shock absorption duties: Left fork tube: damping assembly Right fork tube: spring The configuration offers both smooth action and firm damping performance – a combination difficult to achieve with a conventional fork.

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Race Ready Rear Suspension

The rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately. A self-lubricating anodised coating on the tank cylinder helps prevent wear abrasion, and reduces friction for smoother suspension action. Revised valve settings contribute to improved ride feel and increased rear-end feedback. Lighter shock spring (care of thinner wire diameter, fewer coils and shorter length) offers 285 g in weight savings. Lower spring rate (53 N/mm >> 52 N/mm) contributes to the reduced pitching effect over braking bumps. 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.

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Larger oversized 270mm front disc (up from 252mm) contributes to increased braking power and control. The radical design front and rear petal discs offer strong braking performance, excellent competitive edge with high quality factory looks.

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The KX250F features a launch control system similar to that on our factory racers. With the simple press of a button, riders can activate a separate engine map designed to ensure efficient race starts in slippery conditions. The Launch Control Mode map retards ignition timing, allowing tyres to gain grip in low traction situations.

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For 2017, a slimmer new frame is one of the many components contributing to the new KX250F’s trimmer form. Weighing over 1.5 kg less than its predecessor, the new model is quicker both in the straights and through the corners. Suspension settings for the high-spec SFF Type 2 front fork and Uni-Trak rear shock were adjusted to deliver greater stability over braking bumps and through corners. A slimmer, flatter rider interface further improves the adjustable racer-friendly ergonomics, helping racers to rider even faster

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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. Highly acclaimed for its high output and smooth power delivery, the 2017 model KX250F backs up its dual-injected power and race-inspired tuning and parts (like the high-performance bridged-box bottom piston) with downdraft-style intake routing and reduced mechanical loss (care of an offset cylinder and plateau honing, among other tweaks), resulting in a stronger lower end as well as a 1 kW increase in maximum engine output. As part of the development goal to become the lightest motocrosser in its class, changes to the engine group result in 0.8 kg in weight savings. Finally, a new accessory KX FI Controller enables map calibration without a PC.

Type Liquid-cooled, 4-stroke Single
Displacement 249 cm3
Bore and Stroke 77.0 x 53.6 mm
Compression ratio 13.7:1
Transmission 5-speed, return
Length / Width / Height 2,170 mm / 820 mm / 1,265 mm
Seat Height 940 mm
Curb Mass 104.5 kg with full tank of fuel
Fuel Capacity 6.4 L