I bought new my 2006 RSTD and it is not any noisier than my suzuki c50 and it is alot more bike.
I kinda of wish that I could hear this noise so I would know what I am missing.
Just had my 8k check up new plugs and carbs synced etc. it sure runs better.
Guess I am lucky I have had no real problems with this bike, that weren't done by me (I.E. KN filters and road king exhaust).
But the info I got from this group about plugging up those lines took care of that.
Thanks