2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 154Get this manual
CARBURETORSPORTSMAN 500 Float Height Adjustment
1Illustration 1: Place the throttle side of the carburetor on level surface to remove weight from float armIn this position, the float tongue will rest slightly outwardfloat measurement is even on left and right side
Needle and Seat Leakage Test
12Illustration 2: With the carburetor still resting on the level surface, use one hand to slightly tilt the carburetor backThe float will then fall into the correct position, with the float tongue resting lightly on the inlet needle valve pin without compressing the springThe bottom of the float should be parallel with the float bowl mating surfaceIllustration 3: NOTE: If the float is past parallel with the mating surface, the carburetor has been tilted back too far and the float tongue is likely compressing the needle valve pinInstall the float bowlInvert the carburetor and install MityVacTM (PN 2870975) to the fuel inlet fittingApply PSI pressure to inlet fittingThe needle and seat should hold pressure indefinitelyIf not, inspect needle and seat and seat Oring