Had this problem (constant misfiring) earlier this year around 5/5/14 and was given this advice in this Forum after Heet solved a severe misfiring problem. For the second time since then I have been prepared by this excellent advice.
Now I carry a bottle.When we travel I carry a bottle. It has solved a problem on one of our bikes on a couple of occasions, and has rescued others with problems on at least a half dozen other occasions. A bit of water is possible every single time you fill with gas. It certainly isn't a problem all the time,but it is often enough to want to be prepared for it.
Paul Glaves - "Big Bend", Texas U.S.A
"The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
This time (7/28/14) I was in a lengthy left isolated construction lane on Interstate 80 in Eastern Ohio when the misfiring began.
Pulled out the container of Heet at the nearest Service Area and instant fix with a fill-up. Half a bottle is $1.50
Thanks again, Paul