Originally from the Gold Coast, Queensland, Doohan attended St Joseph's College, Gregory Terrace and Aspley State High School, Brisbane. He raced in Australian Superbikes in the late 1980s, and also won both races as Superbike World Championship visited Oran Park in as well as the second leg of the Japanese round held earlier in the year. In a break-out season he also won the final Australian motorcycle Grand Prix to be held in the TT format at Mount Panorama before the race became a round of the World Championship the following year and moved to Phillip Island. He is one of the few 500 cc or MotoGP World Champions to have won a Superbike World Championship race.