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Top screw, which is the low speed needle, turn in all the way then out 1-1/8 turn.

Side screw (spring around it), which is the high speed needle, all the way in and out 1-1/4 to 1-1/2 turns out.

That is a very conservative starting point.

Tune the bottom end for idle to mid punch and the high end for top speed. Be careful not to go too far on the high speed at a time. Too lean can cause damage.
 
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