Hello, I own a 1994 VFR750F. As long as I have owned this bike, it will sometimes make a knocking sound that seems to come from the front left part of the engine. The catch is it only happens within a certain window of the bike heating up. So if looking at the temperature gauge, C = 0% and the point where the coolant fan kicks on being around 50%ish, the knock usually occurs between 25%-30% of the bike warming up. It stops doing it after that point. Anyone have any ideas? I will try to remember to upload a video with sound of this happening later. Thanks.