HAMERSVILLE, Ohio — The first dollar Rick Doyle ever earned as a $3 million-a-year dealer of after-market motorcycle parts is tacked to the wall of a dusty barn in rural Ohio, where two custom-built bikes have been pushed to the corner, forgotten. There is nothing here now except a 10-year-old tractor. The biker calendar above the desk still reads February 2006.
That’s about when Doyle made an unsettling discovery about an industry that for decades catered to motorcyclists who pride themselves on customizing bikes with unique features and high-powered parts.