Oil leaking where pipe attaches

yup, it could the crush gasket. have you ever removed the pipe? did you replace the crush gasket when you did?
it could also be an over rich jetting. check your spark plug.
or it could be your pipe is not right for your setup.
 
I never had the pipe off or anything. I just got this quad and the kid rebuilt before I got it.
I noticed today that the engine idles at high rpm after I have been riding it for a little bit. Other than that it starts first kick every time and idles fine when first started. Any ideas?