COMES WITH 2 MAIN JETS, USE THE #85 MODELS WITH PRESS IN IDLE JETS: 1. PULL THE OLD JET OUT WITH TWISTING MOTION USING PLYERS 2. CLEAN IT WELL. 3. IF PLUGGED AND CAN'T BLOW THRU IDLE JET ?? (I USE A STRAND OF STAINLESS STEEL FROM AN OLD THROTTLE CABLE, JUST DON'T MAKE THE HOLE BIGGER IF YOU CAN HELP IT.) 332P/#85