well i was coming home the other day from work and heard a light tick/tapping figured something was loose since i had just changed the idle. ok maybe comething got under tank and rattling around. no. I was coming home from work yesterday and still tapping when cold at idle not to bad rev up to 2500 steadily worse. rode home as the temp went up so did the pitch of the sound. Could hear at most rpm's higher is a little harder due to wind exaust. Bike is stock. only has 690 miles on her any ideas. ive heard can chain tentioner. heard its normal. but man its loud. Thanks