RE: Team Infinity 18 Help tuning
The one with the spring on is your barrel stop screw, the other one is you HSN.
Thats the one you adjust for your mixture (lean or rich), you need to know how many turns out you have, if your at 3 your still running rich. You can still go in 1/8 at a time, the right place may be anywhere from 2 1/4 to 2 3/4. you will know its too lean when she keeps falling off pipe, than you go back out 1/8 of a turn.
Dan