I would adjust the air/fuel screws untill you acheived the highest idel. If you go past 3 turns on the mixture screws, you will need to go up 1 size on your pilots, if you get the highest idel below 2 turns, then you need to go down 1 size in the pilots. When you change the pilots you have to start over with the mixture screws. Once you get that fixed, and still have some poping above 1/8 throttle, try shiiming the needles 0.40 (2 #4 brass washers on each needle).
2008 Kawasaki Brute Force 650 SRA
28" Zilla's on ITP SS 106 Wheels
Viper Max 3000 lb winch w/ Amsteal rope
K&N w/ Prefilter, Dynatek CDI, Full Muzzy
Jetted 145F 148R, Polished Slides, Bison Bumpers, Split Audio Tube, MIMB Center 2" Snorkeles, Catch Can Mod.,Tempature gauge
V-Force John Stage 2 Clutch Mod w/EPI Stock primary/Black secondary,
Intake Crossover Mod