Top end noise is a common thing. When you do cam and or intake upgrades you will hear more noise. Most of the noise comes out out the throttle body and it really isn't anything to worry about. What year is your bike?
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.