Mikuni vm 18 tuning help

I have tried 3 different jets, 2 of which 4 stroke at full throttle the other which bogs at full throttle, and I’m stumped. I’ve messed with the air/fuel screw and can’t get it right, is there anything else it could be

Re: Mikuni vm 18 tuning help

Lower the needle. Turn mixture screw 2 turns out (left) from fully closed(edited)

Re: Mikuni vm 18 tuning help

Re: Mikuni vm 18 tuning help

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