Husaberg redesigns the four-stroke single
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Image Gallery ( 3 images )An overhead camshaft operates the four valves (titanium intake valves) by means of weight-optimized rocker arms and also serves as a centrifuge for the engine ventilation. In comparison to the previous model, minimized oscillating masses, larger valve cross-sections and a shallower valve angle lead to noticeably increased performance and improved rideability in the lower load range. A magnesium cylinder head cover that is set at an angle makes maintenance much easier.
Though not the first off-road bike to feature EFI (Electronic Fuel Injection is already standard on ATK, Gas Gas and Sherco models and Suzuki will be the first Japanese manufacturer to offer EFI on a dirt bike in 2008 on the RM450 motocross machine), the Husaberg is certainly running 21st century technology and riders of the Husaberg can expect a cleaner throttle response, better mid-range and top end power and much better fuel consumption, not to mention less emissions and less fiddling getting the jetting just right .
The Keihin engine management system uses a 42-mm throttle body in a direct downdraught from the airbox which is positioned within the fuel tank - this means optimum air-flow and therefore maximum performance. Other advantages of a computer-controlled fuel-air mix include an automatic choke, temperature and height compensation and more riding, less fiddling and instant starting, which can be an absolute life-saver if you manage to stall on a hill. Throw in the electric starter and life will be much easier on the Husaberg than with the ankle-breaking, lung-busting starting techniques required from the performance thumpers of not long ago. Indeed, the Husaberg has completely done away with a kick-start lever. Old-timers might eye this with suspicion, but … we doubt they’d lose the kick-starter if they weren’t confident.
A positive displacement pump reliably supplies oil for all the essential components, such as the crankshaft, pistons and valve train, while a suction pump draws excess oil out of the cylinder head and sends it back to the transmission. And now that there’s only one oil filter, maintenance is easier.
The clutch is designed for extreme loads, with an integrated cush drive and increased oil supply. The system also receives top marks for precise application, thanks to the new Magura hydraulic clutch operation.
In conjunction with an ultra-modern chassis design, it has created an enduro bike that sets a brand-new benchmark for innovative technology and offroad handling.
The new engine concept also breaks the mould when it comes to the chassis. The highest priorities for the Husaberg engineers were: a weight distribution that facilitates handling, the incorporation of high-quality components, the lowest possible weight and super-sporty bodywork with enduro-ready ergonomics.
A new chrome molybdenum frame with a perimeter design ensures the greatest torsional rigidity and reliable tracking stability at a minimum weight. Due to the upright design of the engine, the tubes that pass beneath it were given an extremely slender construction and drawn further toward the back. That allows the bike to have the narrowest overall width and more ground clearance – a huge advantage in difficult terrain.
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