2013 KTM 450 SX-F, A very sweet and very fast ride. Electric start!!!! 2013 KTM 450 SX-F POWER FOR ALL A completely new, significantly lighter engine, featuring groundbreaking injection technology, guarantees brutal yet controllable power. Packed into a chassis, which has been improved massively in terms of bodywork, frame and suspension, the 2013 KTM 450 SX-F sets a new benchmark among the 450 four-strokes in terms of performance and maneuverability with its easy handling.