I ride full throttle only, so I did away with the carbs all together and have the fuel lines running right into the intake. Plus is saves weight...
Reality... I messed up when taping one, took the tap in too far and the threads got smashed. I filled with jb weld, re drilled and taped.. has held for a couple years.
So when the threads on the tap stop... You stop, they are far enough. I read that u had to make threads all the way into the carb... Not true, only the outer part of the idle screw has threads anyways.