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pilot jet is idle to 1/3 throttle.
If your turning the A/F screw all the way to get it running the pilot is wrong. 1.5 to 2.5 turns out from seated (and don't bury the screw either)
Main jet is WOT with the metering needle taking over duty from the pilot jet to WOT main....
the idle screw should only be a crack open from seated not fully wound in or out.
If it needs so much choke then the tune is to lean...
if it fouls the plug and smells thick it's too rich...
You should not be tweaking needle clip position at all for idle. Needle clip meters the mid range throttle response of bogs and sputters.
get your pilot and A/F sorted out before needling and mainjet...
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