Canadian born Marshall Plumb has been around the pro motocross and supercross scene since the mid-eighties. As a factory mechanic for Team Suzuki, he wrenched for Guy Cooper, helping him to the 1990 125 National Motocross Championship, then went on to spin wrenches for Brian Swink. In 1998, Marshall took his knowledge of suspension and motor tuning to the public, opening Marshall’s Racing in Stillwater, Oklahoma, where anyone can get factory treatment for their bike.