When I am running in 4th or 5th gear and I let off the throttle quickly I hear a quick high pitched squeal. It also happens when I downshift from 5th to 4th or 4th to 3rd but it does not do it at lower speeds in the lower gears just at 40 to 50 mph and above. It's just a quick high pitched squeal for a second when I roll off the throttle or downshift at higher speeds. Bike is a 03 Road King, any ideas ? Thanks !!!