My brand new V10 is making a cracking noise that seems to be coming from around the head tube. It cracks when brakes are aplied while pushing the bike lightly, and then when the bike is pressed down, somewhat similar to a loose headset. The headset (chris king no-threadset) is tight, however. I was wondering if this is a fixable problem, or just the monocoque being its noisy self, as my friend has suggested. Any help would be much apreciated.