I have a 2006 yz250f that is not running right.. i put it away last winter with all the stock jets and stock everything and it ran well.. how a stock yz250f runs. Anyways i put a pipe on it along with adjusted the valves over the winter along with putting in some new jets, i put a 175 main in from a 182, a 55 leak jet from an 80, and changed the needle clip from the 3rd to the 4th along with the o-ring mod. Now it is breaking up down low and running like crap, once it gets hot and dies it will not start! I chanced the clip back to the 3rd position since i figured it could be starvin for gas, did nothing. Took out the o-ring, did nothing. Now im left with the only other 2 changes leaning out the main and smaller leak jet.. but these both make since and wouldnt cause this problem i dont beileve, i dont want to change my leak jet back because everyones running 40-55 leak jets.. Anyways sorry for the long post hope someone can help! Thanks in advance!!