The noise from the heated grips can be ELIMINATED by wiring the grips directly to the battery. Unplug from the connector behind the fairing pocket and wire from there back to the battery. I have no noise any more. Works for both Honda and Hot Grips.
I have heard that you can get away with just running the ground directly to the battery to get rid of the noise.
Thanks for the info guys. I just hate to rewire another one of Mother Hondas mistakes on a set of high priced OEM grips. Plug and play is the reason I have the Honda Grips. So far they have been 3 times the trouble I had with the Hot Grips (with the variable reostat) I had on my 1500. and they are still NOT fixed. I guess at twice the price they will wind up being 4 times the trouble. THERE I FEEL BETTER NOW..................... JOHN