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Hey guys, I think its time to ask a 2018 FRC MX 39 question. I know theres a thousand discussions on this (But most prior to 2011 and its 7 years later... just saying) Do you leave the 100 Pilot Air Jet in or not??? Look it up and you get different answers (Both with good reasons). Just want to know leave it in, and why? Or take it out and why? My Elevation 1,200ft Temp = Pennsylvania (Means it could be 80 degrees today and 40 degrees tomorrow) My Mods MRD Exhaust 160 main jet 45 pilot jet EMN needle clip 3 200 main air jet 100 pilot air jet 2 turns fuel screw o-ring mod