Honda teammate Johnny O'mara to represent the US in the Motocross des Nations in Maggiora, Italy. Team U.S.A. won with a clean sweep. Back home, he finished second to Bailey in the 500 class. The rivalry was short-lived as just prior to the start of the 1987 season Bailey was paralyzed in a practice crash.

Johnson dominated the 1987 season, winning both the 250 and 500 crowns. In 1987, Johnson also won what is considered one of Supercross history's greatest races in the Super Bowl of Motocross at the L.A. Coliseum.