I had some time to work on the bike yesterday afternoon. The fuel in the float bowl looked clear, but I don't know about the plug (D9EA). It's been in there a while. Maybe I should pick up a new one.
The points felt was very cruddy. Whoops- I didn't realize that thing came off the plate. I cleaned it, soaked it in Tri-flow, then squeezed out the excess and reinstalled it. Looks like new.
While I was in there I advanced the timing a tiny smidge, too. Soon I hope to set it with a strobe.
About how much play should there be on the points shaft? It's probably tough to tell from the animation, but do you think this is too much? I can upload the raw video to YouTube if you think it'd be any clearer.
I didn't see any cracks in the coil housing, but there was some clear goo around the front insulator. Is this what you were talking about? It looks ancient, but maybe it only recently escaped the insides of the thing.
I also adjusted the valves (years of working only on my boxer motor has made me soft- it's a tight squeeze in there). The exhaust felt a bit tight. I set both at .003".
I only had time for a short ride. Throttle response is markedly improved! It's nice and snappy now. I wasn't able to reproduce the high-RPM stutter, but I didn't get much time on the bike.
I still haven't cleaned the points contacts because my sandpaper collection has gone missing. I'm off to the hardware store to pick up a few sheets (and painting supplies for the XL) this morning!