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When you hear this noise if you pull in clutch does it go away?
Could it be the belt and you hearing at low speeds but at 50mph you don't hear it.
Belt could be miss aliened witch is very common with Vic's.
It could be coming from front pulley.
Put passenger on bike and have them listen four ears are better then two
If you hear it...open the gas cap. see if this helps. Maybe a pinched vent tube
2006 KP Custom
2011 Blue XC
2009 Vision Tour Premium (Black)
2007 Hammer S
2005 Custom KP
2002 Touring Cruiser Deluxe
2000 Custom C