I too had this problem. First, what elevation are you at where you are tuning? I am at 2000 ft and here are my specs: 140 main, 35 pilot, AS out 3/4 turn, stock needle on the top(leanest) clip. For every 1000 ft in elevation I rise, I turn the AS out 1/4 additional turn. My jetting is just rich enough that I don't need to mess with it as I go higher or lower in elevation. With this setup, and the engine warmed up, I can ride in 1st gear, clutch out, at an idle engine RPM and when I wick the throttle the front wheel will easily loft and loop the bike if I don't chop the throttle. Same senario in 2nd gear will loft the front wheel but not loop the bike.
Now for my secret weapon............Fuel. I discovered that the AS adjustment made almost no difference between 1/2 turn out and 2 turns out until I switched to VP C-12 race gas. I mix with Maxima SuperM 2 stroke oil, useing 3 oz of oil to 128 oz (1 gallon) of gas. Other gases may work too, but I KNOW what works in my setup so why mess around?
Other mods I have made to my bike that may or may not affect off idle performance: FMF woods pipe, FMF Turbinecore II S/A, FRP torque ring, VForce II reeds and cage, Wiseco piston, Airbox lid removed, Steahly flywheel weight, NGK BR8AIX plug, 12 tooth C/S sprocket.
If I were you, I would get my hands on some VP C-12 and give it a try. Also, there is a lot of information on this site discussing various fuel types you may find valuable. That is how I selected this fuel.
As far as wearing the screws out on the carb, stop in at the local hardware store and get some allen head screws.
As far as the order of mods to enhance low end performance, I would try this order: C/S sprocket, pipe, reeds, ring, flywheel weight. The flywheel weight is a blessing for preventing low rpm stalling in those akward situations and also smooths out any hit in the RPM range.
One final thing: make your AS adjustments in no more than 1/8 turn increments. If you use any more, like a 1/4 turn each time, you can easily pass up that sweet spot. This is very important!