2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 306Get this manual
BRAKES 2Measure the disc thickness at eight different points around the pad contact surfaceReplace disc if worn beyond service limit
RemovalReplacement
NOTE: To reduce the possibility of warping, try removing the brake disc mounting bolts before applying heat to the bolts1Apply heat to the hub in the area of the brake disc mounting bolts to soften the bolt locking agent
= In mmBrake Disc Thickness: Service Limit: .140"3.556 mm 23Remove bolts and discClean mating surface of disc and hubInstall disc on hubInstall new bolts and tighten to specification