I have a quad runner 500 I think its a 2000 and it runs good.... sometimes. when I start it the choke has to be all the way on and it will run for about 15-20 minuets and start backfiring and die. it will start back up if I let it sit for a few minuets and will run for about as long as I let it sit. no matter how I adjust the choke it will not stay running when warm. let it sit 15 minuets and its good for another quick ride. any help would be greatly appreciated.


thanks in advance