Winter grade fuel is long gone here. I buy the same fuel I put in the Roadliner I had. I could get 40 mpg out of the Roadliner, what a beast. It has to be something related to intake, spark, exhaust or something else. Valves don't require adjustment till 26,000 miles, but maybe that is the problem. I think I will check the easy stuff first, like the air cleaner, change plugs and sync the carbs. Might be a week or 2 before I get started, but I will report back here. I am persistent and I will find the cause.
Thanks