Former Superbike World Champion and AMA Superbike Champion Doug Polen will be signing autographs in the Ducati area during the Advanstar Cycle World Motorcycle Show at the IX Center in Cleveland, Ohio Friday through Sunday. Polen won the Superbike World Championship in 1991 and 1992. Polen won the AMA Superbike Championship in 1993. All Polen’s Superbike titles came aboard Ferracci Ducatis.