Being new to my '07 Burgman 650 I'm still getting used to it's sounds. I noticed this morning I could hear a sound from the shifter when the belt ratio changed. It was a slight bzzt sound each time the "gears" changed. I don't think I've heard that before in the scooter. Is that normal when the shifter motor runs? Also there's a kind of whistle-y sound when running down the road. I can't get it to make that sound when running the bike on the center stand, only when riding. Other than that there's very little mechanical noise. I'm still a bit leery of the transmission holding up. My Silverwing is a lot simpler, probably much like the Burgman 400, I don't worry about having a drive problem on the SW, I know of several that have exceeded 100,000 miles with no problems. Reading about the CVT problems with the Burgman I'm still a bit concerned about the likelihood of transmission problems with the 650. Other than that concern I'm impressed with the scooter. But until I develop more confidence in the Burgman I'll keep my SW as a stablemate.