Hey guys I just picked my son up a 2009 drr 50 and I'm having a problem . This thing won't start unless you put the choke on even after you ride it for a long time it still just don't start unless you choke it. It runs great when it starts I intend to let him start racing xc next month and if something happens that it stalls on him he won't be able to get it started back. Any help would be great.