can anyone explain this one to me. i put a yoshi full exhaust on my 250ex and i couldnt get it to run right with the recommended main jet(110) . i tried a bunch of other jets and i still couldnt get it to run right so i put my stock back on. when i did that i put a 92 main back in instead of the 95. yesterday i put my yoshi back on and left the 92 main in and it ran good. before it used to stall out in the top end of the midrange gears and backfire alot. now it does none of that. it sounds backwards and from everything ive read in this forum every body goes with at least a 105 main or up. i also have a k&n filter on it and i am almost at sea level if that has anything to do with it. help me if you can, im brain boggled