Vuillemin switched to the MDK Honda team managed by former national champion Steve Lamson in 2007. His first race with the team came at the US Open in Las Vegas where, he led Carmichael and Stewart for half the race before falling to third where he would finish. Vuillemin finished sixth in the American Supercross Championship earning him the Top Privateer Award. He was seriously injured at the Millville round of the 450cc outdoor motocross championship and finished the season ranked tenth in the final overall standings. Vuillemin was never able to regain his successful form after his Millville accident.