I been trying to tune my Mikuni carb now for a while, I bought the AFR gauge and used that to my adavantage while tuning defiantly makes it easier instead of reading plugs.
I had the top end correct but was way too rich on lower end, been fighting trying to lean it up on lower end but pilots didn't change anything in lower. By time I buy different needle jets and jet needles and slides I could have a better carb for all that money.
Just recently I took the 34mm minkuni off the I have plenty of main and pilot jets for and went a different route just bc there are to many adjustments to get it where It needs to be.

If anyone needs a 34 mm with a good selection of main jets and pilots I'll make a great deal on it.

When you change the pilot you also need to adjust the Idle air mix.