this is what i have 07 660 rhino/clutch sheave/cdi box/k&n air filter no lid/slip on biggun. at low rpms iam getting a pop though the intake. there is a 55 jet and a 170 in it right now with 2.5 truns out on a/f screw. what to do? its driving me crazy when putting a round camp and all you here is pop pop!!!!!