So my D&D can has decided to start throwing rivets. I have replaced some of them before but they started to sheer off after only a week. I was using aluminum rivets. But now I have removed the muffler completley and am in the process of replacing the rivets. What I'm wondering is, is would it be harmful to ride around with just the pipe and no can? Also is there a particular rivet that would work better than an other?