The bike is a 2007 WR450F and is stock other than the usual free mods and jetted for the stock pipe. Once I put the FMF Power Core 4 on it I get the occasional POP when chopping the throttle. I have an adjustble fuel screw. Should I adjust it in our out to try to eliminate the decel pop? If so how much. It does not happen all of the time just enough to be annoying.