Talk:Honda VF700S

i have an 84 honda sabre vf700 since new. Have had problems with idle ever since ethanol gas mandatrory at the gas stations. The bike idles, but from driving speeds or accelerating on center stand and release of throttle when it idles down it stalls. It will the start up and idle. I have tried adjusting idle screw under the carbs and it works and does not. Anyone have similar problem, suggestions? I have been using fule additative to clean carbs and jets per suggestion of honda tech, but still problem. thanks drk