Referencing the zed1015 air corrector jet forum post from 25 Dec. 2019 link below:
kzrider.com/forum/23-for-sale/611992-air...kunis?start=0#815860
Mikuni BS30/97 Air Jets come with orifice sizes ranging from 0.5 to 2.0 per Niche chart (link below) which appear to correlate with measurements observed on my digital micrometer.
www.nichecycle.com/ncs/categories/carbur...r-jet-by-mikuni.html
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.