Notm sure how new you are too this.......
Remove EVERY jet, and the throttle slide with the long needle. Spray it all out with carb cleaner and compressed air.
Count the turns until the air screw LIGHTLY bottoms, probably 1.5-2 then take it out. Clean that as well; The order goes screw , spring, washer and oring. Any of it wrong will screw up idling and or off idle. Carb kilts come with all the jets and stuff, but the body still has to be be spotless.
If it has a metal tank, run an inline filter too and clean your petcock screen and reserve screen etc etc......
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country