Here are some pics and a video of the new muffler. Its an Emgo short <a href="
http://www.crc2onlinecatalog.com/emgo_muffler.htm">reverse cone</a>. I got it from Cycle Recycle in Indianapolis - nice group of guys and very easy to work with. They've got a million used parts in their shop, so if you're looking for something you can get in touch with them and see if they've got it.
http://www.youtube.com/watch?v=eiiUEjO8znY This is an '86 and I got it with very low miles. The previous owner said he did the white spacer mod and I only got backfires when I turned the bike off. These were mostly quiet little "puffs". The header was a bit yellow when I bought it - I've put a thousand or so more miles on it and that has deepened to what you see in the pics. What is that from?
I took her for quick test ride yesterday after getting the muffler installed. Its MUCH louder than stock, but has a nice, throaty growl to it. It'll take some getting used to but I'm loving it so far. No back-fires except on shut-down as before. Power-wise, I haven't noticed any significant changes. It feels like its maybe lost a little bit throughout all gears, but most markedly when I'm in 4th. It doesn't feel like it has the same roll-on power that it had before. I always shifted by the sound of the engine though, so some of this change may be me reacting differently to the sound & volume of the pipe. The muffler is much less restrictive than the stock. I really don't know where to begin with rejetting the carb. Hopefully tomorrow will be dry and I can go out for a WOT test. Any suggestions or ideas would be greatly appreciated!