Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
It could be one of the exhaust heat shields vibrating if you hear it on the right side. sometimes the clamps are loose and sometimes the tack welds on the shields break loose, it will drive you crazy.
While you are at it, just for the hell of it, check the tranny fluid..