I have a CTS 1300 with about 1200 miles on it. I don't know if it is me or if I have never noticed it before. The other day while sitting at a long red light, I shifted into neutral and let the clutch out. I noticed a slight whirling sound and felt a light vibration in the handle bars. I don't do this often so not sure if it has been there all the time. Before riding, I start the bike in neutral and let it idle for a minute or two before riding off and have never noticed this. Had oil changed last year at 600 mile mark by dealer. Anyone noticed this or thoughts.