Lately my 2006 Uly has developed a whine. There is no whine while stopping. The whine matches wheel rotation regardless of gear. But as happened before, the whine was there as I rode out about 10 miles to an appointment. The whine was silent as I rode back 2 hours later. Any ideas? I have recently done a drive belt change, but the whine was there before and still is just like before. This bike has not been used for wheelies, etc. I should add that I have had the bearings replaced front and rear, and that also made no difference.