The KX design philosophy – to put mid-level to expert riders on the top step of the podium – has not changed since the brand was launched over 40 years ago. The KX250F is arguably the most successful racer in the extremely competitive four-stroke 250cc class.

Adding to its highly acclaimed engine and chassis performance, numerous industry firsts and advanced technology, fine-tuning for 2015, including new adjustable ergonomics, makes the new model the most potent KX250F yet.

Tuned to best suit race-experienced riders, the 249cm3 liquid-cooled, four-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 (thanks to the world’s first dual injection for motocrossers, a direct-flow intake, and race-inspired tuning and parts like the high-performance bridged-box bottom piston) and Launch Control Mode, for 2015 the KX250F receives some fine-tuning for a stronger low-mid range and enhanced durability.

KX motocrossers have long drawn on works technology to offer riders the best possible performance right out of the box. Launch Control Mode is just one of the factory features that give riders an edge when lining up at the start gate.

Adjusting engine settings to suit conditions has never been easier than with the KX’s DFI couplers. Plug-and-play style system is quick, easy and stress-free. And the optional KX FI Calibration Kit is the same kit used by Kawasaki’s works teams in the US.

The kit enables expert riders to adjust engine characteristics (by rewriting actual data maps) to suit their preference, record riding data, and analyse their riding data to further fine-tune their settings.

Both injectors are fine atomising injectors with four holes, dispersing spray particles with a droplet size of 120 μm for the upstream injector, and 75μm for the downstream injector. The downstream injector’s finer droplet size and wider spray angle contribute to stronger low-mid range power feeling, improved response and quicker acceleration.

ECU settings have been changed to match the injector and rotor changes, contributing to the increased power feeling and engine response, and low-mid rpm performance.

The high-performance piston, featuring the same design used on our factory racers, contributes to improved performance at all rpm. A short skirt, reinforced
external ribs and the use of a bridged-box bottom, featuring internal bracing, result in a lighter, stronger piston.

It has thicker under-surface and thicker reinforcing external ribs add to piston durability. Revised, lighter piston pin offsets the weight gained by the piston reinforcement.

Magneto rotor with a greater inertia (9.0 kg.cm2 to 9.5 kg.cm2) matches the increased acceleration performance.

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 were chosen so that the rear tyre would drive the bike forward (instead of causing it to squat).

Acclaimed for its high-speed stability, the chassis is complemented by its Separate Function front Fork (SFF), which offers greatly reduced friction that contributes to increased riding comfort and improved suspension performance.

Revisions to the SFF Type 2 fork valve settings result in stronger damping. The firmer settings result in improved high-speed handling, greater ride stability and improved performance when landing jumps.

Like the fork, revised valve settings result in stronger damping. The firmer settings result in improved high-speed handling, greater ride stability and improved performance when landing jumps.

The KX250F’s frame and minimalist bodywork, designed with rider ergonomics in mind, offer a slim rider interface and racer-friendly ergonomics. Complemented by new adjustable handle and footpeg positions, the natural riding position makes it even easier for racers to go fast.

Upper triple clamp with two sets of handle mount slots and reversible handle mounts offers riders a choice of four handle positions to choose from: 25mm FWD, 15mm FWD, STD and 10mm BK.

Adjustable footpeg brackets enable riders to lower their footpeg position 5mm. In the lower position, centre of gravity is lowered as is the rider’s point of view, adding to both physical and psychological stability.

Petal disc brakes are among the KX250F’s numerous factory-style components. The stylish new discs (the front now 270mm oversize) contribute to both sporty looks and a high-quality appearance.

Thinner walls for the tubes of the rear frame (t2.0mm to t1.8mm) save approximately 50g in weight. Lighter front and rear wheel axles save 31 grams and 32g, respectively.

For 2015, green highlights on the suspension adjusters and engine oil cap and generator cover plugs contribute to a distinctive Kawasaki look.

Kawasaki Australia is yet to release information regarding pricing and the official release date.