Been done here LOTS, check search function.. OK,One more time...
Open both 2 turns
Start engine
Lean out high speed needle for max rpm, then back off about 200 rpm
Slowly lean low needle and try transition
Do it until no transition
Open low slightly until transition is good
Re set high, leave slightly rich
FLY............................
Applies to ALL gassers, Walbro, Tillotson, Zama, Del Orto, Bing, etc.....................