Ok so I bought a new DG pipe for my 250 and it leaks at the flange. I used some copper rtv rater at 700 degrees and it blew out after about an hour of riding. Does the DG not use the stock flange? Is there some other kind of rtv that would work better? I let the rtv sit for a week before I fired up my bike. Also there is a little bolt next to the spark plug that was leaking a little bit while running. I went to tighten it down and it seems to be stripped it get kinda tight then gets loose again. I got it to where it isn't leaking anymore, but it worries me. Is the fix just replacing the valve cover? If that is what its called, I am new to 2 strokes. Thanks for any input you have.