Carb tuning, larger accelerator pump nozzle?

Mattax said

Can, but not always.

Exactly. And that's the main purpose of an air bleed.
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Yes. We can learn a lot by observing as the physical relationships aren't always as we think they are.

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Tell that to Bewy. I can’t remember when it is that a bigger MAB doesn’t always start the mains quicker, but I believe it’s some weird situation. Like when a power valve can open at idle and make the engine rich. I haven’t yet found an example of a bigger MAB delaying the start of the mains.