2003 Polaris 3 PRO X Factory Service Manual, Page 118Get this manual
CARBURETION Adjustments Throttle Synchronization ProcedureMikuni TM-38TM-40 Flatslide Carburetors
5On remaining carb(s), loosen phillips head screw inside the offset nut
6When screw is loose, hold throttle to wide openTurn offset nut until throttle slide is in same position as base carburetor