Mikuni jetting

I have a fresh 72 750 commando with a Jim C cylinder head,JS Motorsport stage 1 rotating assembly (lightened carillo rods pistons cam and followers ) stock exhaust tri spark EI single coil conversion.I am breaking this engine in with a 34 mm Mikuni and will swap over to the Kehin flat slide conversion as per CNW once there’s some time on this new build
So my question is what do you think a good base line is for main pilot and needle setting to get me in the ballpark,the carb is as new from Sudco ( rocky Pt ) any feedback is appreciated
Z