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strange sound when throttling

mojo01

New Member
I have a stock 2007 fatboy. I noticed a strange whinng sound when I turn the throttle quick or when changing gears up quik. I hear it on the left side while riding. It's Harder to make the sound when idling but I can do it and then it seems to come from the center of the engine. Does anyone know what this is.
 
Could be the automatic chain tensioner in the 07's, there have been a few that had to be replaced because of over tightening.
 
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