try 40pilot, 130main, middle clip as a new base line for post modified top end.
Cold starts seem to like a small bumb in idle knob adjustment till warm...(my case) you will learn to adjust on the fly depending on the weather...
it takes a good few minutes before the engine gets up to temp so and throttle snaps can still bog early on...
But its possible current carby setting are at fault.
Though it could be spark plug related...
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