On my son's 2003 CR85, where the exhaust chamber meets the cylinder head, it is leaking. I'm working on the spooge problem(jetting etc.). The question I have is, the end of the pipe seems much larger than the flange. The metal type gasket isn't much larger. When I put the pipe on I can move it side to side a lot. Does this mean the metal gasket is bad, or is this normal? Also I was wondering if I could seal this end of the pipe with some type of silicone to make it a tighter seal? Thanks Dom.