AFB Tuning

Bewy said

Does the carb have a large brass screw in between the idle mixture screws?

I can see one problem: it looks like it has a single plane intake.

Is the engine stock?

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Yes. It's a 3853s.
Stock 180hp 2bbl engine (Commando Clone)
Has a Stock Commando Iron Intake and Carb and a Racer Brown Commando Cam (.420 lift I think)
Triple R, it just has a slight hiccup or Hesitation when you ask the secondaries to come in.