400EX pipe vibrating

[TGW_400ex]

I recently installed a pro-circut T-4 on to my 400ex has anyone else experianced a loud vibrating noise after instalation? I think its the spacer u have to install but I donno any sugjestions?

[cals400ex]

my friend had a few problems with that too. i am thinking the skrew that holds the silencer to the frame was too short. i don't exactly remember. make sure everything is tight. also, out stock header came with an exhaust gasket that goes on the header/silencer connection. so if yours leaks air there, get a new exhaust gasket. it is made out of a lead material. your factory one is probally stuck in your silencer and it would be destroyed if you tried to remove it. make sure your pipe is not hitting anything on the bike either. with it being a lot louder, it may seem as if it vibrates more too.

[TGW_400ex]

The thing is the vibration vibrates all my screws loose. I put the stock one back in and put some spacers on it and it seems to be quiter for now atleast