I would second that motion. Chevrolet's fuel pump is very noisy; similar sound, just deeper.Isn’t that sound the fuel pump?
This is what I am thinking also, as it seems like it is coming from the top of the Engine.Maybe it is the servo motor for the throttle? I've heard machine tool servos make a high pitched whine when trying to maintain axis position. Perhaps it is doing the same. Still say it is normal though.
Buy a Sena, start your music, you won't hear a thing. It's what I do. Now that I ride with music, I don't know how I ever rode without it.Thanks for the anwers