Where a U.S. District Court did not abuse its discretion in excluding expert testimony on a cause of a motorcycle crash, the lower court order was affirmed.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Philip P. Simon, Northern District of Indiana.In July 2013, Donald and Mary Timm set off on a cross-country trip on their Harley-Davidson motorcycle. The Timms’ route began at their home in Dyer, Ind., with a final destination of Salt Lake City, Utah.While crossing Nebraska, the …