I have a brand new 2014 Valkyrie with less than 500 miles on it and have something, perhaps similar, going on with mine. Even when sitting still it sounds like a frog ribbeting down under the gas tank, sort of in a cyclical manner. It can be heard while riding as well. I think I have narrowed it down to a clutch/transmission sound, but don't know anything for sure yet. It seems to change tone when I pull in and out the clutch. It is a pretty irritating sound that I am pretty sure is not supposed to be there, but I've never been around another Valkyrie to know the difference. Does this sound like the same issue you are having? Do you all think I should post this issue on another topic/thread to get some more feedback? I have thought I would change the oil to synthetic at 500 miles, and if that doesn't change anything I will take it back to the dealer. Thanks for any help.