Thanks all for the help, here is what I did, I had an old 46 LA laying aroung in my junk box and mounted that needle valve to the fire wall and just left the ****ty one on the 91 FX, then I changed out the fuel tubeing using a larger diameter tube. I have conducted several runs on the ground and seems to be working a whole lot better that before. Hope that this cures the problem, I'll head to the feild just as soon as I get some more fuel, used 1/2 gallon trouble shooting........I think OS should cover my next gallon for me.LOL!!!!!!
Thanks again all, and I'll send another message after my next day at the feild.
Shogun