I got bike #1 put back together today. I did a real good cleaning of the carb, new air filter, new spark plug, reset the carb screws to factory, and lowered the main jet to a 67.5.
The bike seems to run a lot better. I couldn't tell a power difference (I don't think a .05hp increase makes a difference for a 220lb guy) but my daughter seemed to think it was better.
We have been mixing fuel for a long time, and not using the oil injection system. Many internet folk say to just leave all the injection stuff on, and simply not fill the reservoir (which is what I have done). This go round, I actually removed it all, and capped the oil nipple on the carb. The amount of air that was being blown out and sucked in through the oil nipple was crazy.
[video=youtube;nhovc4AIXyI]https://www.youtube.com/watch?v=nhovc4AIXyI&feature=youtu.be[/video]
After the nipple was properly plugged I was able to get the bike's carb tuned to idle right, and run well. We will see how it does on the hills at grannies track next week.