Bike, ported the exaust today, when I took the muffler off I noticed a chunk of weld right there where the exaust exits the very end. Probably restricting 5 to 10% where it finaly exits, my dremmel wheel was a perfect fit. I was so excited that I almost tried to ride it without my High temp Copper RTV being dry have to wait 24 hours. I do not know if the RTV I used is so great, the packeage says do not use on gasoline areas, I think the stuff on my intake is starting to shoot out the sides.