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.
Sounds like the fuel pump. You may want to have the fuel filter checked. You might have gotten some gas station tank sediment in your tank. If you see a tanker truck filling the tanks, drive on by. It takes up to four hours for the sediment to settle. Don't see many stations with working fuel filters.
Try a complete system fuel cleaner with an injector cleaner/lubricant in it.. varnish buildup inside the injector flaps/ pressure chamber makes that noise.. no big deal, but annoying and maybe robbing a little power/ economy.