1) IDLE. Set idle speed to proper r.p.m. by adjusting the IDLESPEED SCREW. Turn the IDLE MIXTURE SCREW or AIR SCREW to achieve highest speed and best response. After adjustment has been made reset IDLE SPEED SCREW to proper r.p.m.
2) OFF IDLE to 1/4 THROTTLE. The SLOW JET and SLOW AIR JET are most effective in this range. When you want a richer mixture in this range use a larger SLOW JET or a smaller SLOW AIR JET. The opposite holds true for a leaner mixture.
3) 1/4 TO 3/4 THROTTLE. The JET NEEDLE is the most effective component in this range. Raising the needle by lowering the clip position at the top of the needle will richen the mixture. Lowering the needle will lean the mixture
4) WIDE OPEN THROTTLE. Changing the MAIN JET effects this range. Select the size which offers the best W.O.T. performance, then install one size larger MAIN JET for ideal engine durability.