Greetings, I've got an '83 R100RT with the following exhaust part numbers on it: 18 12 1 233 031 18 12 1 233 032 I just put a replacement right muffler on it with this part number: 18 12 1 234 453 The right muffler that was previously on the bike had an incident. I dropped it at a gas pump and the mounting bracket punched through the muffler. I patched it with some soda cans and some hose clamps. Now I'm a bit confused. The new muffler is about twice as loud as the broken original one. Ideas?