I have an 87 lt250r quadracer, bored .04 over with a tm34ss mikuni carb, #240 main jet. air fuel adjustment screws on the left side of the carb, i was wondering how many turns out is a good starting point for tuning the carb, right now im running really rich it's about 1.5 turns out on both, so do i screw in or out??? thanks alot for your help guys...