A novice can pull a carb easly just remember how you took it apart and how the lines and cables are routed. Diagrams help. Check the fuel filter as well could be letting dirt by and getting stuck in the valve, but at 13yrs Id say the rubber needle is the culpret probably hardend and ownt seat right.
2006 Polaris 900 Switchback
2009 Polaris 600 RMK 144 w/HAC
If it ain't snowin' I ain't goin'