There is another current thread on decel popping. Keep in mind that if you have more open (less restrictive) pipes, some decel popping is normal. If you adjust the pilot screws out to eliminate all of it, you will be running too rich. Turn the screw back in a bit until you do have some decel popping. Put some miles on and then check the plugs. As Ed (OldRoadie) said above you should make changes about 1/8 turn at a time.