The 250cc DOHC engine is designed in conjunction with the chassis to operate in perfect harmony. All internal components are engineered to deliver the maximum possible performance and packaged to position the engine at the ideal centre of gravity within the chromoly steel frame. The addition of a carbon fibre composite subframe and WP AER48 fork, the FC 250 is one of the most technologically advanced 250 4T motocrossers available on track.
With years of experience in designing the most advanced steel frames in offroad, the engineers in Research and Development designed a chromium molybdenum steel frame that redefines all structural aspects that benefit handling, ergonomics and packaging. With carefully calculated tortional and longitudinal flex, the frame works in harmony with the suspension to offer sharp handling and superior comfort. These characteristics, matched to a lightweight and compact engine design, offer exceptional handling precision while at the same time increasing bump-absorption and feeling.
The FC 250 engine feature a CSS (coil spring steel) clutch with Magura hydraulics and lever. The CSS clutch has six coil springs and 7 clutch plates in a one-piece CNC machined steel clutch basket. The inner hub and pressure plate have been designed for optimal oil flow and separation, while the coil springs give a light and consistent feel.
The DOHC cylinder head features finger followers with a DLC (diamond like carbon) coating resulting in minimal friction and optimal performance. These actuate large titanium valves (32.5 mm intake, 26.5 mm exhaust) which at the 14,000 rpm rev-limit open and close multiple times each second introducing fuel/air mixture to the carefully designed combustion chamber delivering efficient and optimal power throughout the rev-range.
Along with the benefit of easy starting, the standard electric starting system is combined with a new compact Li-Ion battery which is 1 kg lighter than a conventional battery.
All major components and shaft arrangements have been carefully designed and placed in specific positions that best suit the performance and handling characteristics of the FC 250. The 250 cc engine is not only light at 26.1 kg but also remarkably powerful with an overall power output of 46 hp at the output shaft. One way in which this was achieved was by engineering key components to produce the least amount of friction possible, reducing drag as a result.
The WP AER 48 is a new milestone in the development of Husqvarna motocross models. It is simple, lightweight and easy to adjust through a single air valve and supplied fork pump for pre-load and click adjusters for compression and rebound. The system is made up of a set of split-system forks consisting of an air suspension unit and a hydraulic damping unit. Together with the fully adjustable WP DCC rear shock, Husqvarna offers superior suspension performance, feeling and comfort.
Optimised for easy operation, the map switch selects between two engine maps, operates launch control and activates a traction control feature. Traction control works by analysing throttle input from the rider and the rate at which the RPM increases. If the RPM increases too quickly, the EMS will register a loss of grip and reduce the amount of power to the rear wheel ensuring maximum traction.
