The 1991 Harley-Davidson 883 Sportster (called at the time U.S. Twin Sports) Championship was one of the best in the history of the series. Pictured here at the Topeka round that season are the two main players in that year’s title battle – Scott Zampach (No. 204) and Tripp Nobles (No. 4). The two rivals were about this close the entire season. The battle came down to a winner-take-all finale on the streets of Miami and Zampach edged Nobles to win the championship.