RS Flat Slide MIkuni carbs utilize BS30/97 air jets.
With current cool air temps and low humidity where I live, my engine purrs at idle, and spark plug color appears good. Acceleration and deceleration are strong/smooth with the following (air corrector?) jets installed:
#1 size 1.0
#2 " 1.2
#3 " 1.2
#4 " 1.1
The Pilot Fuel Screws are set between 1/8 and 1/4 turns out from lightly seated.