Ive never seen them check an exhaust at any track, EVER. As far as noise, you could take the exhaust competely off a 200X and it wouldnt be as loud as some of those 4 stroke quads. Id get it taken care of when you can, but dont let it stop you from coming. It wont be a problem, and there will be much louder machines there. Also ear plugs are nice when your inside there watching.