I was going to this 2014 thread. Two people said if it equipped with a vapor canister for California emissions or the like, and the canister is saturated, hot conditions will cause the bowl vent lines to suck fuel back in from the canister and flood the cylinders whiles it's sitting after a hot ride. Mine is doing the exact same thing. It's not the coils or ECM. It's not PAIR or the vacuum fuel shut off valve. It's the canister! Take the whole canister system out and make sure to block any vacuum leaks. Vent all the carbs together just under the front of the air cleaner housing to atmosphere like the non California st1100's without abs and traction control are. Vent the fuel cap down my the lower frame to atmosphere. All this hot soak stuff should go away. If not, then maybe check the coils. It fixed mine at 5000-10,000ft above sea level right away. Got rid of my fuel cut off valve and threw in away. Diaphram still was good and pliable. But after a $125US tow bill, I didn't want anything left that may cause problem. I'm making mine as clean as possible for worry free travel! Really can't believe only 2 people spoke up about the canister and nobody ran with it! That's the problem! Get rid of that if you have one!