I don't know about type of gas but other then that the reply's are exactly what i was expecting to hear.
yesterday i'm pretty sure my bike vapor locked, i had just filled up the tank and was riding in a town about 12 miles from home and it was hot about 85, its starting to warm up here in cali, bike was running fine in town and then i hit the hiway on-ramp and the moment i hit the throttle it bogged down and tried to die, i let off of gas and hit it again and it wanted to just die so i had no choice but to pull over right there half-way down the on-ramp, the bike died and i waited about 1min and hit start button and it started right up and would idle fine but would die soon as i gave it any gas.
So i had this exact same problem about three years ago in hot weather and had to pay $110 for a flatbed tow, i had an idea what the problem was but did not no how to fix it and did not have the proper tools with me at the time.
Well this time i fixed it myself, i carry a small tool box with basic tools just for this type and other basic types of road side repairs.
At first i wasn't sure what the problem was because the bike has been running like the King of the Road for two years with no problems, So i stand back a few minutes and look at her thinking it died the moment i gave it gas witch rings a bell and gave me flashbacks to three years ago and leads me to think fuel starved / crap in float bowl, vapor lock, plugged fuel filter, gas cap, kinked/collapsed fuel line from heat.
First thing i did was break out my tools and grab the foot long hose and drained all 4 carb bowls and while i was there i seen that the clear fuel line was crimped/kinked about half inch from the fuel filter and the line was only half full, so play around with the line trying to straighten it out by moving it around then one at a time one i open the carb screw and turn petcock to prime til i see good gas flow from the hose to ground, (careful here don't want any fires).
Second i open the gas cap and start it up then hit the gas and all was good.
i drove home with the gas cap loose, not wide open for bugs to dive bomb, when i got within a block from home i locked the gas cap.
about 30min later i needed to run an Arron a few miles away and i had no problem but i expect this could creep back up on again with temps getting hotter now.
MY CONCLUSION:
I think this is very important, three years ago when this happened it was hot outside and i had just filled up the tank and drove 12 miles to a Lows store, after about 30min when i came back to my bike it started but would die when i gave it any gas.
yesterday i had just filled up my tank and drove 12 miles and it was hot outside, sound familiar.
i think the cause of the problem is a full tank of gas adds pressure and with heat and pressure on the fuel line it kinks/collapses - Instant Vapor Lock.
Now in my situation it could have been a combination of things but from now on i will not top off the tank in summer or anything over 72-75f
What i gotta do now is run out that tank of gas and remove the tank and check all the lines witch i know all should be good except maybe the one that kinked and unfortunately that's the main fuel line that plugs in between the carbs. little bit of a pain to swap but the line is probably still good just needs re-routing but again unfortunately i will probably need longer line if i want to re-rout.
the line i have is the clear tygon about 2 year old, i have heard that tygon does kink kind of easy with a little heat but the good side is it dont flak off little bits and plug up filter and carbs.
i still would like to hear more on this, draining the carb bowls would have been much easyer if i had a 4to1 hose system or maybe even steve's drain tubes would stop vapor lock?