This READY TO RACE bike rules the AMA Supercross Championship. Winners - line up here Motorcycles Motocross DX78098024447761269001044 DX1 . 2017 KTM 450 SX-F Class Leader!!! If gold is what you? re after a 450 SX-F is what you get. Its secret? Precise handling and arm-stretching grunt. Thanks to its compact engine delivering explosive but controllable power it? s the weapon of choice for the Red, KTM Factory Team and the champion Ryan Dungey...