I used STP Complete fuel treatment a while back. It is about 7 or 8 dollars compared to the regular STP treatment which is around 3 or 4 dollars. I'm still having problems with my bike sputtering and acting like it is starving for fuel. It seemed to help a little but the problem came back in a short time. I'm tool challenged (that means I ain't got any)
and haven't been able to clean my t-filter. I think I tend to agree with the manual. If it says don't use it, I probably won't.
