Maybe the "bad gas" frequency will go up with Ethanol settling to the bottom of storage tanks?
The vapor pressure values I got the from the Tennessee report that Marco linked above.
Doesn't the 60 fuel pump recirc back to the tank when the carb bowl valve shuts off?
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln