I have noticed that when I haven't ridden my bike for a few days (or when it has been pretty cold outside) that when I turn the ignition key to the on position, but before I press the starter button, there is a high pitched whistle/circulating sound for a few seconds. It goes away, but sure sounds bad for a second or two. I'm assuming its the oil cooler initiating circulation. Is this normal? Is there a way to make it stop. It is almost embarassing if someone is present and goes, "What the h*ll was that!?"