Is it very faint or loud?
The early Wings all had this issue, but it was very faint. I have it on my '01, but it is so faint that I only notice it on music with very quiet passeges. As long as I have a normal level of music playing, I don't notice it at all.
On a bad note, I've not been able to reduce this noise. For my iWay I had a power line filter and a GLI filter and that took care of the alternator noise. Still, a motorcycle is not the right environment for high fidelity so, I'm willing to put up with a little noise as long as it's not the predominant sound.