The 1991 Superbike World Championship season was the fourth in the history of the FIM - Superbike World Championship . 26 races were held at 13 events.
All the results achieved were included in the World Cup ranking.
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The US American Doug Poland on a Ducati 888 became the superior world champion . He won 17 of the 26 races held, securing his first Superbike World Championship title.
No European drivers started at the event in Canada because they thought the Mosport route was too dangerous. The starting field consisted of just 17 US and Canadian pilots.