Hey guys got a 2013 kx250f that I can't get to idle just right, and when I'm wide open on the track it'll just big down out of no where. The valves were tighter then they should've been. just redid the valves but no luck there. Made a trouble code reader for the diagnostics plug but it says no codes to be thrown. The fuel pump and pump filter are good. Does anyone have any ideas????? Thanks!