I am not sure how you know you are at 32:1 if you poured oil into the gas tank. As an overall average, you should be running 50:1, although it is not a monumental difference between the 2 ratios.
I was not referring to the springs for the adjuster screws, I was referring to the spring for the float arm. I do not know what basket you are talking about. I apologize but I don't seem to be able to understand your answers to my questions. It feels like I am asking one thing very specifically and you are answering something else.
Yes, I was talking about the pulse lines. I was suggesting double checking each one of the 3 on both ends to make sure one had not come off. They can be quite tricky to get installed properly, so it is worth double checking, especially when you hear some weird sort of noise from that area when you let off the starter.
AS far as only starting 1x on ether, I suspect it fouled the plugs and that was why it would never re-start. Spark plugs cannot be cleaned to be restored to new condition. Once they are fouled, they are permanently damaged and need to be replaced.
I think at this point what you need to do is siphon all the gas out of the tank and start from scratch. Get a couple of 5 gallon gas cans regular 89 octane gas and Yamalube 2W marine 2 stroke oil. That is 2.56 ounces of oil per gallon of gas to yield a 50:1 ratio. By pouring the oil in the gas cans, you are able to shake the cans to ensure a thorough mix of the oil in the gas. Fill the tank from the gas cans.
I would suggest at this point spinning the engine over with the spark plugs out, but installed in the caps and grounded properly away from the open spark plug holes to try to pump out any gas and oil that might be sitting in the crankcase and causing the plugs to wet when attempting to start.
Replace the spark plugs and be sure to use resistor spark plugs and wide gap spark plugs. Non resistor plugs will produce RFI signals that will negatively affect the ignition circuit and cause running problems.
Check the pulse lines, and then try to start it. You should have to use full choke and no throttle at first, and if it doesn't light off fairly quickly, after the filter fills up of course, crack the throttle open ever so slightly to get it running. It will not run very long on the choke, so within seconds of it starting, be ready to shut the choke off completely.
Do you have a Yamaha Service manual or just the owners manual?
Did you happen to look at the catalyzer when you had the exhaust off to get to the carbs?
I will say I am impressed you were able to get the carbs off, that is no small feat on the XL1200's.
Give that a shot and let me know what you get. If we still are not getting fuel to the spark plugs, we will need to go back into the carbs and figure out why we don't have proper flow.