I have an 02 Sportster with a kehin carb. I am having a problem with popping thru the carb mainly when cooler engine temp and low rpm. You can hear what sounds almost like combustion when sitting idling. I was advised to install a thunderslide kit, so I did. Now when I try to start the bike it pumps so much fuel thru the pilot jet holes in the trhoat of the carb that the bike will not idle and can bearly keep it running. I don't know what that would have to do with the thunderslide kit, probably nothing, but that is the only thing I changed. Any ideas would be appreciated.