Let me know model of bike,etc and I can advise settings etc,float bowl and correct float vital and condition of carb body also important, you can buy new cabs from W&W but expensive.
Lots of parts avaliable in UK or USA,I keep quite a few,but stocks getting low.might have a spare body,lots of sub specs derived from different markets,venturi sizes etc.
Had 40 plus years with HD,s run 46 model U and 28 J,and owned and built most models.
Just got my first GS,and wished I,d done so years ago,don't like any modern Harleys,cut off about late 50,s!