Originally Posted by
FastJake
Since the OP is referring to the frame (or more specifically the head tube) as the "body" I think suggesting they investigate this themselves is very poor advice.
Take this to a knowledgeable mechanic and have them look at it. If you have a friend that knows bikes they can take it apart and show you how it works.
I strongly disagree. Just because I don't know the correct names of all bicycle parts, doesn't mean I can't work on it myself. I've been repairing my own bikes for many years and learning along the way.