Not sure about Yamaha, but suzuki has what to do about the ethanol right in their user manual... 05-06 models
Also I've found that the dealers are pretty well educated on the ethanol problems so they might be a good source to ask about "real world" issues. I ask alot of questons... probably to the point of annoyance with them.. but that what they get paid for i guess.
ive had over 150 trouble free hours with the ethanol blend. i hope it stays that way
