I have a 02 XR250 and just cleaned up the carbs and did Gordon Mods. Went to next higher main (135) and pilot (50). Started great without choke - which I read on this forum meant it was running rich. When it was hot I could not kick start without letting it sit for 15 minutes. I figured out I was getting too much fuel and I had pilot screw 3 turns out so I successively turned it in until finally settled on about 1 /14 turns out. Starts when hot now on first kick. However, now i have just a slight stumble off of idle. I am trying to understand the role of the pilot screw, jet and idle screw and how to optimize start up - cold and hot, idle and pick up right off idle. I have the stock pilot (48?) and wondering if I should go back to this and try adjusting idle screw to compensate. Any suggestions?