Factory-style graphics, black alumite rims, black front guard and rear fender, blue alumite finish on the suspension adjusters, and a blue finish on some of the engine trim give the KX250F the looks to match high tuned performance.

A 43 mm throttle body makes use of a progressive throttle link to deliver airflow in much the same way as would an FCR carburettor. Using two linked shafts, the throttle body opens more quickly after the 3/8 open position, delivering sharp response and excellent power feeling. The lightweight throttle body is approximately half the weight of an FCR carburettor – a weight saving of about 600 g.

A super-hard titanium coating on the outer surface of the inner forktubes combined with Kashima coat on the inside of the outer tubes reduces sliding friction and improves action, for a better ride feel.

Front and rear petal discs are complemented by a new front break master cylinder and front break pads, for stronger breaking performance and control.

Linkage mounts below the swingarm for more precise suspension tuning. dual compression adjustability offers a wide range of tuning options. Kashima coat on the tank cylinder improves action. revised dumping settings match the new front fork and revised chassis balance.

Adjusting engine settings to suit conditions has never been easier than with the new DFI couplers. The new ECU features three engine maps (soft, standard and hard). riders can easily switch between them to suit riding conditions just by plugging in each of the 4-pin coupler.

The KX FI Calibration 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.

Aluminium perimeterframe is a lightweight construction composed of forged, extruded and cast parts. Revised rigidity contributes to lighter handling and improved rear wheel traction, while a slimmer design contributes to improved ergonomics.

Tuned to suit the demands of race-experienced riders, the 249 cm3 liquid-cooled, 4-stroke Single’s wide powerband focuses on high-rpm performance and extends rideability way into the over-rev. Already highly acclaimed for its high output and power delivery - thanks to race-inspired tuning and factory style parts like the high-performance piston with bridged-box bottom - the 2012 KX250F takes MX engine performance to the next level with the world’s first moto cross dual injection system. The power increase – recognisable by riders of any level – is complemented by inheriting the smooth FI response feel of the 2011 model. Further engine changes offer even smoother shifting and increased durability.

Slimmer new frame, new minimalist bodywork, a flatter tank-seat line and new handle grips offer a slimmer riding position and improved ergonomics, making it even easier for riders to go fast.

A high-performance piston features the same design used on our factory racers, contributing to improved performance at all rpm. A short skirt, reinforced external ribs and the industry’s only mass-production use of a bridged-box bottom, (featuring fully flush internal bracing) result in a lighter, stronger piston.

The KX250F fuel injection system features dual injectors: an injector downstream of the throttle valve (where injectors are usually located on standard FI systems), and an upstream second injector close to the airbox. Unlike the dual injection set ups found on supersport models (where the upper injector operates only part-time, providing additional fuel when necessary), the two injectors in the KX250F fuel injection system have different roles. The downstream injector is used to ensure smooth, instant response while the upstream injector is charged with providing power. As rpm and the throttle position increase, operation switches from the downstream injector to the upstream injector. (Depending on whether in a low (1st, 2nd) or high (3rd, 4th, 5th) gear, the switch is either progressive or almost instantaneous.)

The KX250F is the only mass-production motocrosser featuring Showa's Separate function fork (SFF) type 2. Thicker fork tubes and new internal construction offer increased damping performance and stability when on the breakes or landing jumps.