Ricky Carmichael Suzuki RM-Z450 2006 1:18
the first time a four-stroke won big in AMA Supercross/Motocross, featuring a highly modified 449cc engine , Carmichael won 15 AMA Motocross and Supercross championships, including a record-setting seven AMA Motocross 450cc championships and five AMA Supercross 450cc titles. He holds the record for the most overall motocross wins in AMA history (150 wins)
