Hi Ken, I've had the Carb off many times but never had to remove the exhaust to do it. I disconnect one bolt from the front and the other from the rear. I have also replaced the exhaust and if I remmember right there is a flange that has 2 bolts in it that holds the exhaust in place, if you take the exhaust off make sure you reasemble it on your work bench and replace it in one piece.
John