I have a 2004 Yamaha Big Bear 400 4x4. It starts right up but won't stay running. I pull the choke out and it will run at a high rpm but as soon as the push the choke back in it die unless I have the throttle open alot. It also backfires through the carb before it dies. I tryed adjusting the idle and cleaning the carb. If anyone has a idea of what to try next plz let me know asap. Thanks