Riding my 07 Road King and sounded like the bike was coming apart! Loud rattling sound primarily in 3rd gear and especially under 2500 rpm. Also when accelerating in third gear as well, once I get the rpm at 3 or above it goes away. Came home and checked all exhaust connections, found the header bolts on the front jug a bit loose, some loose heat shields and a sheared bolt on the left rear exhaust bracket. Fixed everything and most of the rattle is gone but still some intermittent rattle and still primarily in third gear. The only thing I have done differently since this began is change tranny fluid to Spectro 6 speed. Any ideas??????????????