1982 Ducati 900SS (864cc L-twin engine). The Ducati 900SS is one of the most important road-going superbikes in the company’s history. It was a direct descendent of the 750SS which took a dominant 1-2 victory at the 1972 Imola 200 with Paul Smart and Bruno Spaggiari. The first year of mass production for the 750SS was 1974, and from 1975 onwards a new engine was used, dubbed the “square case” due to the more angular design of the crankcase. This new engine featured two sizes, a 900cc (864cc) and