I have heard that the gas company use two different formula for winter a summer, I don't know if that was what made my bike's FI light come on, but I used some new stuff that Lucas came out with it is a octane booster I could not tell if it help or not. You can call Lucas, I have talk to them just ask for the tech people.
one other thing I have gone to mid grade gas on this last trip, still can not tell any difference.
I know this is not much help, they are not making our bikes any more, I want to do what ever I can to keep it going. let us know what you find out, Thanks Ron