Hi all, I'm new to the forum, but I have a puzzle that has me a bit perplexed. I have a Keihin FCR carb in a 2004 RM-Z 250. As of now I've got a decel pop that ranges from a couple small pops at about 60 degrees air temp to a downright insane series of pops at about 45 degrees. I have a feeling this is my idle circuit, but here's a spec list of my current jetting; -40 pilot jet -1 and 5/8 turn out on the fuel screw -178 main -3rd clip from the top on the needle -these are Team Green settings for the 04 kx250f, same bike notes: -valves are freshly shimmed and within range -carb just cleaned -no vacuum leaks -altitude of 1500ft or so The big question is, is this something i should be concerned about? and if so, what is a remedy to the problem? If I overlooked a thread related to this, my bad, i did try and found nothing relevant to my problem. Any help would be appreciated.