Carb Tuning with AFR Guage

hangn0ut said
When a fuel curve is flat thru say your lower and middle rpm range but leans out at high rpm then a smaller jet in the lowest hole in the emulsion tube should help. Curve flat in the middle and upper rpm but rich on the lower rpms,then a larger jet in the highest hole in the emulsion tube.

Thanks for the help. After some reading and research, this makes sense. Although, I'm not sure my classic HP carb has screw in emulsion jets..... I know this is standard on the Ultra HP but I have the classic.

Maybe I can get the fuel curve flat enough with air bleeds and main jets.