2012 KTM 450 SX-F, When it comes to pure power, there is still nothing to replace displacement. The only problem is applying the power to the ground. The 450 SX-F's high-quality chassis allows advanced riders to convert the brutal power of the innovative DOHC four-stroke engine into controllable traction, even on the toughest MX tracks. With an even more robust clutch, the 450 SX-F is still a real ace in the MX1 class.The 450 SX-F's sensational, state-of-the-art four-stroke single-cylinder engine, featuring twin overhead camshafts and four valves actuated by means of cam levers, excels with an extremely wide usable rev range and immense torque coupled with unrivalled performance.Exhaust manifold with HPRS: In conjunction with the innovative HPRS (Header Pipe Resonator System) and large-diameter silencer, the 450 SX-F's super-light titanium exhaust manifold ensures plenty of power at low noise levels.The 450 SX-F's state-of-the-art frame made from high-quality chrome-molybdenum steel is not only extremely light and torsion-resistant. It is also characterised by a particularly balanced geometry that combines easy handling with razor-sharp precision.