I have never understand how to do it. I did it once long time ago after diy servicing the carb but result in lower power. could be previously it was setup for a tad more power at high end.Wanna ask otai here about setting ex5 carburetor. By youtube, adjust higher idle then adjust air to get higher idle.
Lastly adjust to normal idle rpm.
Any good instruction for stock setting...tq
I screw in the air IN to the max (will cause the engine to idle abnormally ) and adjust the idle slightly higher. Then i turn the air screw out until the engine starts to idle or firing normally. Give it a couple of rev and it should rev up smoothly at entire range. If not then need to fine tune little by little. I get very good fc with this setting but loses a bit of breath on top end.This could be the stock setting.
Need good communication and listening skill to understand what the engine note is telling u.