It's the alt drive unit. You know what, Alley Kats didn't cover mine up. The whine from mine is still louder at idle than the Kats. When mine was new you could not run the bike inside of a garage or next to a wall. It would drive you nuts. Loudest I have heard. In 35,000 miles it has either worn in and gotten quieter or I just don't care anymore. I don't really know which! LOL...Jim King said:Is there an easy fix to eliminate or reduce the noise level of the engine whine?
(Perhaps Alley Kats are the only solution?)