Can someon tell me what role the starter jet plays (Mikuni Flat Slide). If I understand it right the air screw plays a role at idle, pilot jet plays a role up to about 1/4 throttle, along with the fuel screw, then needle works between 1/4 and 3/4, and main jet after that. But what about the starter jet, what does that do? I am asking because I want to lean out one of the cylinders a little at idle. I saw a diagram once that broke it out, but I can;t find it. Thanks