39 hours. The 2019 450 SX-F Factory Edition engine has a new CP box-in-box piston, a new Pankl connecting rod with a bushing in the small eye for reduced friction, and new topology optimized rocker arms. In the suspension department, the WP XACT air fork and WP XACT shock feature updated settings. The Factory Edition has several trick components including CNC-machined triple clamps that have an adjustable offset of 20mm or 22mm, an Akrapovic slip-on muffler, D.I.D. Dirtstar rims with orange hubs and orange spoke nipples, an orange frame, holeshot device, front disc guard, composite skid plate, orange rear sprocket, and Red Bull KTM Factory Racing graphics!