I'm not sure I have the nomenclature correct here. One of the things in the wiki refers to the jets as main, idle/pilot, and choke/starter.
So the idle jet feeds the idle and progression circuit, and the pilot jet feeds the starting circuit? Is this correct?
I can get my engine to idle decently by adjusting the idle mix screw, but if I crack the throttle to WOT from idle, the engine bogs, but it runs fine once the RPM increases.
Is this the same problem you're experiencing? I'm just a little afraid of leaning out the mix too much at closed throttle, and not getting enough lubrication while decelerating down a hill. I guess if a smaller idle jet doesn't help I'll put the 50 back in, and try something else.
Let me know if you get it solved :D