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may be too late, but i'd dissuade against jetting until you nail down the issue. You are complicating the diagnosis path by doing too much at once.
When you set the idle screws to 3 turns each side....was that with bike idling, fully warmed to achieve highest RPM?
Have you actually syched the carbs with a pro manometer?
When someone cleaned your carbs, did they have possession of the bike or just the carbs?
Did the wandering idle/noise come immediately right after the carb work?
Did the bike ever run properly under your possession?
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