I have an 04 ttr 125 and it wont idle. It will only idle on choke for a short period of time. I would think that it needs to be richend up, but it already fouls plugs because it is running to rich. I went into the carb today and cleaned all the jets with CLR and tried a bunch of settings on the idle screw. still wont work. The jets in it are a 105 main and 15 pilot. any ideas?