Tom, After trying everything, plugs, all jets, oils, ratios, etc. I finally made my own Idle Screw just a few threads longer than stock and shaped the end on my bench grinder-like the stock screw. Idles nice, I can adjust it a lot better now. It doesn't surge and runs clean due to all of the jetting. I run Maxima Super M at 40:1 with a BR7EVX and 92 Octane Pump.
Rick K.