Something to think about when venturing into adjustment land:
Try to have a baseline, to put it back to, before you start. That way you can go back to where it was just in case it gets so far out of whack. My dad taught me how to tune carbs on his old VW bus. Turning mixture and idle air speed screws a 1/4 turn at a time.
These days, cameras on phones make this pretty easy.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.