2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 345Get this manual
BRAKES 3Install caliper on hub strut, and torque mounting bolts
FRONT BRAKE DISC
Inspection
1Visually inspect the brake disc for nicks, scratches, or damage2Measure the disc thickness at eight different points around the pad contact surfaceReplace disc if worn beyond service limit
18 ft.lbs(25 Nm)