10% Ethenol fuel boils at lower temp then non ethenol'd fuel and it will be even worse when they introdue 15% ethenol fuels in the neart future.
Again,is'a all anbout reducing ther heat the fuel system collectively see's/absopbrs like meyal fuel line inbetween cyls/flaot bowl/maoin carb
body /metal body of fuel pump/ etc.
From the factory Yamaha installs 1 very thin piece of INFERIOR (Not up to the task)insualtion material on the metal fuel iine inbetween cyls & on backside of fuel pump faceing cyls and non on the flaot bowl or body of carb (where it can be safely applied) and thats why the cabrs/fuel systems overheat boiling fuel of carb in many cases without the fuel pump on too because f-pump sint the route case but aggrivates the situation when carb is already puking fuel or if itys just about to puke fuel post filling up with fuel and turn on the ign
But properly dbl if not tripple insulate the main
componatnts of ther fuel system (Fuel oline inbetween cyls/flaot bowl/carb body/fuel pump)with the hi teck 2k deg f insulating tape mayterial i used and thast gets the job done.
Use only 1 layer of different or inferiro insulating material on only yher fuel ine inbetween the cyls and or leave out other fuel system items i suggest to insulate and all bets are off . When doing that you will get so so incosistant reults at best which has already been shown to be the case here when the yamah srv'c tech improperly insulated part of the fuel system with 1 layer of who knows what insulating material and the carb still puked fuel,no surprise to me at all.
Every carb/bike thats been insulated like i suggest with materials i suggest has stopped puking fuel every time including mine that puked in 55-60 deg temps and now doesnt puke at all at 95-100deg f.
And thats including 4-5 other fellow RSC memebers that asked for my info on how to do the carb puke fix and also a friend of mine locally that had carb puke issues with his 05 silverado too so i am up to approx 7 bikes that had carb puke issues that properly-fully did my proceedure follwoing my suggestions that now have no more carb puke with 100% success.
All the non belivers or people that only did a half assed job using inferior insulating materal and didn't insulate all the items i suggest can say all they want about it not working after they didn't do it corerectly because they felt they didnt need to do certain things etc .
But results is what gets it done IMHO
and my suggestion of what's a good insulating material to use,how many layers of insulating material to use in what places along with here to apply it " collectively gets the job done " fixing carb puke for good.