Ok Guys, I think I have finally come to closure on this issue, meaning my original post of breaking up @. It has been quite a journey. In review, I have cleaned and re jetted my carbs...but not totally in that I needed Michael Coffey to vapor clean and find the buggered air mix screw washers that were probably preventing the bike from running at it's optimum. Basically, I have new carbs that I can continue to play with the jets if I am so inclined, but not today. Was that the ultimate problem?, No. I checked and installed a new coil, re soldered all of my ignition oriented connections for the umpteenth time. Someday I will just do a whole new loom, but not today. I replaced my Pamco with a modified Pamco and replaced the E-Adv with a mechanical auto advance. I will probably go back to the E-Adv some day, but not today.
So here it is...It was a vapor lock problem with my gas cap and fuel line. I did do the tests of running gas out of the bowls. It ran, but I did not run it for five minutes. I should have. I tested gas running out of the tank. It ran, but I did not test it for five minutes. When I declared success and relief several posts ago, I was running about a half a tank of gas and the bike did my five mile loop just fine. So the other day, I thought I'd do a hundred mile run just to see if I could. So I went to the gas station, filled it up with premium and went for a ride. The bike bogged down and died three miles in. I was pissed. WTF!!! So I let it die. I stewed for a few minutes, then I opened my gas cap and closed it and the bike started right up. I couldn't believe it. Oh, and I had just installed a new gas cap seal that I had found in my parts drawer.
I got home with the strongest belief that the full tank did not leave enough air for fuel to flow. I then did the tank drain test again with a clear gas line and I noticed something I never noticed before. I watched a progressive bubble start at the pet cock and work it's way to the end of the gas line, catch it's breath and then start all over again. I opened the gas cap and did it again and saw a similar thing happen. Then, I drained the tank. Took it off. Flipped it over and unscrewed the petcock and heard a whoosh of air when is separated from the tank.
Two things came to mind. One is that the tank was in vacuum and two it was time to examine and clean the petcock.
Well, I dismantled the petcock, cleaned the filters and reassembled and reattached it. Then I did the tank drain test again and noticed that the air bubble was still present, but not so much.
I decided to dismantle the tank cap. I noticed the fiber cap liner was soaked and swelled. I tried to blow through the small hole in the cap and air was not flowing very freely. So I drilled the hole a little bigger in the outside and inside diaphragm. I removed the fiber membrane and I took the little washer out of the inside of the diaphragm. Then I blew through the hole and there was plenty of air. I put the cap back together and closed it and did the drain test again and low and behold, fuel ran clear and without restriction. So, I filled the gas tank and took it for a series of loops in my area. Thirty miles later it was still going strong.
So, was it one thing? Probably not, but I really think that all along, the bike would not run on a full tank because it couldn't breathe. Good thing it only took me two months to figure it out. In the meantime, thanks for chiming in. I learned a lot through this process. Some one was right from the beginning, ns you have the right to brag if you know it was you, but I never completed the tests correctly. However, I now know how to trouble shoot just about everything there is about ignition and carbs and fuel flow.
Thanks for your patience. This XS is ready to run.
Grace and Peace, All. This thread is done...except for those who still want to tell me I told you so. Go ahead, I deserve it.