Hi Pricilla,
I have a 07 TA and I was having similar problem with it when I was riding last summer. Anyway, I found that I had a bad ground on my RH side coil to which I simply cleaned and I haven't had a mis-fire since. I wouldn't think the shelf life on the Sta-bil would be much of a factor unless it is really old. I have used the same Sta-bil for a couple years with no problem. I would also think you would have noticed some fuel dampness around your exhaust outlet. Just my two peso's.
Mark
