Ok, I am going to document my progress step by step as I go through diagnosing this problem so that if anyone else runs into a similar problem they will have some info here to reflect on.

This morning I did the following:

Removed and flushed tank. Removed Petcock and cleaned/verified cleaned. Removed internal Petcock filters (Thought maybe they were causing a small restriction).

Replaced fuel line with another piece of new fuel line. Fuel line is 5/16 rubber core with outside stainless braid (if that makes any difference).

Reintalled all of the above (less the petcock internal filters).

Filled tank with 2 gallons of fresh fuel. Verified that fuel ran at a steady full stream. Looked good, full flow full size of the fuel line (as before). I read somewhere (now I cannot find it) that someone actually timed the amount of fuel flow from the tank for this configuration (with no fuel pump). I beleive they tested quantity of fuel over time. Does anyone remember reading this? Has anyone tried this?

Tested bike.

Same problem.

Next: I will order a higher volume petcock to replace the factory one. When inspecting the factory petcock I noticed that the inlets (on the inside of the tank) and the internal channels were considerably smaller than the outlet and the 5/16 fuel line. Although I donot believe this is the probem, I want to rule out any possibility that there is a fuel flow problem. At this point, I suspect I have done something wrong internal to the carb, either float setting, or other. I have noticed something in my previous inspections of the carb and forgot to inquire. Notes I have read, both the manual and on this site indicate that the float setting is set with the carb being level and based on the mating surfaces of the bowl and the carb itself. What I preceive as a level carb renders the mating surface as not level. Do I need to set the bowl with the mating surface as level or the carb mounted on the bike and the bike level (ie on a frame lift stand, as I have done), or with the bike on a level surface on its kick stand leaning to the side (which at this point he mating surface would appear to be level)?

Huygens