2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 64Get this manual
FUEL SYSTEMCARBURETION The jet needle and needle jet have an effective operating range from approximately 18 to 78 throttle openingThe amount of fuel delivered during this range relies upon the jet needle clip position, as well as the needle jet size and other specificationsThe main jet affects fuel delivery at 14 throttle and consistently increases to full throttle opening3The float should be parallel mm to the gasket surface on all youth model ATV carburetorsWhen setting the float, be sure inlet needle valve spring is not compressedIf adjustment is necessary, bend the tongue slightly
THROTTLE OPENINGCycle
INCREASING
Float Gasket Surface Parallel
DECREASING Float Height: Parallel to Gasket Surface 1mm