Just put my 98 Adventurer back together after replacing shifter shaft, cleaning and jetting the carbs, adjusting the valves, lubricating polishing, etc, and it runs!!

While taking it apart I found it came with straight through peashooters, the famous TORs, I'm guessing. They have the warning that theya are non EPA certified. My question is, at the junction of the pipe and the muffler there is a cylindrical baffle that looks like it just slips in (or out)of the pipe. Has anyone seen this before? Is it to make TORs legal? Should I leave them in or get rid of them? No info from the PO when I bought it, he didn't even know what peashooters are.
Incidentally, I jetted down to 92.5 jets and 1and 3/4 turns out for idle mixture to compensate for the altitude, (6000 ft.). Pretty close to the same steps I used on a Kaw Concours, which worked pretty well. I'll know soon if I'm close.