just did a topend on the wifes bike , having trouble with it starting when its cold had this problem before the build i have to kick the shit out of it and it will start then die then git it started again and its a struggle to keep running . I have not done anything to engine asfare as mods that would affect jetting ,bore is stock with stock head only mod is timming plate slides are timed , pilot is stock main is 300 and needles clips are one down from center also has t5s p,s once the thing is warm its fine