hey im new here i have a 2003 kfx 400 that has the same problem my bike is completely stock i cleaned the carb i still havent found the prob was wondering if you found anything new on this...i dont think this is a elec prob it sounds like its running out of fuel or to much i checked the float and its working fine no overflowing of the carb it just stalls you can let the bike idle and shake it a litle and it starts to stall if anyone can help it would be great