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I rebuilt a carb from a 150cc chinese atv, after adjusting the mixture and idle screw its now running pretty well. It idles fine (it used to slowly go down until the engine stop), and from 0 to wot it doesn't choke like it used to. Only issue is that is I let go the throttle at 50% rpms may hang for a bit before going down. But that's now my question.

The carb is a PZ27 (I think it's a mikuni clone), it looks like this:

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And the jets look like this:

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My question is: do you screw both jets all the way in? Or is the amount of turns you screw them in/out part of the adjustment?

I don't remember how the original were, but since they didn't have a spring I just screw them all the way in.

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