Posted 23 May 2012 - 06:28 PM
So I just bought a 2009 yz250f from one of my friends, its got a new motor in it (bottom up) and has been running great! About a week ago we were out trail riding and started back firing and popping mainly on decel and wouldn't idle.. I had just bought gas from a different station that morning in a hurry and figured maybe it was bad gas so I pulled the carb apart and cleaned it out. Now it will idle and isn't back firing nearly as much but seems like it is kind of missing thru about 1/4 throttle and then cleans up? It's also been dumping a little gas when i put in the back of my truck.. Could the float level be causing this?? From about 1/4 throttle on it runs fine.. Any help is greatly appreciated!!