Here's how to remove the main jets, emulsion tubes and needle jet on a Honda CX500, GL500, CX650 or GL650 set of carburetors. Check it out!
I was never able to get one of the "emulsion tubes" out. It was really stuck in there. Clearly this would have been helpful to get more fuel in where it needs to go. (and I didn't try to remove the other one)
I was using a screwdriver that was too small but then I was able to get it out easily with a 3/8 drive socket that came with my home Depot tool set. It's labelled FD4 and had just the right depth to reach it. The bike ran a little better after that but still on choke only so I'll replace those insulator o rings next. The old ones were flat for sure. I did spray a little wd 40 around them when I was testing and I thought the rpm went up a tiny bit but maybe just wishful thinking on that. Larry's carb book should be on the way.