As speeds continued to increase, organizers eventually moved away from high powered Grand Prix-style motorcycles to highly modified production motorcycles known as Superbikes in 1985, which led to a global trend of Superbike racing that by 1988 would lead to the development of an FIM-sanctioned Superbike World Championship in 1988. The loss of Grand Prix machinery meant that fewer international competitors were interested in entering the race and, began a slow decline in the event's prestige.
As speeds increased, the focus shifted from high-performance Grand Prix motorcycles to highly modified production bikes called Superbikes in 1985, triggering a global movement that by 1988 would give rise to an FIM-regulated Superbike World Championship. This change also led to a decrease in international competitors and a decline in the event's reputation.