2003 Polaris 3 PRO X Factory Service Manual, Page 171Get this manual
CLUTCHING Adjusting Belt Deflection on the High Performance Roller
1To adjust the sheaves, loosen the 716" jam nut on the belt witdth adjuster2Using 18" Allen wrench, adjust the threaded set screw as neededNOTE: Turn the set screw in (clockwise) to increase the distance between the sheaves and out (counter clockwise) to decrease the distance3Tighten the jam nut after the belt adjustment has been made