Any help please!!!! I have been reading through the jetting threads, trying to figure out what might be wrong with my jetting. At this point I am getting somewhat confused though. I have not riden in about 18 months nor have I done anything to the bike, due to bad back. Today I took the carb off did a thorough cleaning. While carb was off I finally put my Quickshot2 on. Put carb back together installed on bike. Bike started on first kick WOW was I surprised. Let it warm up a bit pushed choke in and the bike was idling like crazey, so i played with the fuel screw turned it all the way in and the idle didn't change much. Turned the fuel screw out to 3 turns and still no change. Is this due to the quickshot I just put on? So I am a bit stumped. I am not sure if I should start with the pilot or the needle clip & position. Here are my current setting with all mods done to bike with FMF powercore exhaust. The bike had been running great 18 months ago. Tell me if i'm doing this wrong. I have the idle turned down just enough for bike to run. Than I start adjusting fuel screw and shouldn't the idle start to raise? If so, it's not and i'm not sure if that has to do with which jet. While riding the bike after it warms up it runs pretty good but it has a slight popping on deceleration and popping when you blip the throttle in nuetral. Please any help would be appreciated. Year:2002 Model (400 - 426 - 450):426 Cam Timing (WR/YZ):WR Main jet:170 Pilot Jet: 45 PAJ:Stock Leak Jet:N/A Starter Jet:Stock Fuel screw (turns out):1.75 Needle Model/Clip position:JD red/5th For Summer 120 degree heat. Winter see below. Grey Wire Mod (Y/N):Y TPS Connected (Y/N):Y Airbox Snorkel/Lid (on or off): Snorkel Out, Lid Modified AIS Removed (Y/N):N?A Airfilter Brand:Twin Air Exhaust Brand:Stock header muffler FMF PowerCore4 Average Altitude:sea level to 2000' Average Temperature:45-125 degrees F Average Humidity: 5-100 Percent Degree of Satisfaction (0-10):So far 10/10. Additional Mods/Comments:Thick o-ring mod from the JD kit.