Harley-Davidson Motor Company (Harley-Davidson) is recalling certain model year 2014.5 FXDL Dyna Low Rider motorcycles manufactured January 6, 2014, through June 19, 2014. In the affected motorcycles, certain optional performance electronic control module calibrations may allow higher engine rpms that could result in engine vibrations that cause the ignition switch to move from the “IGN” (ignition on) to “ACC” (accessory only) position, which will shut the engine off.