2011 Polaris Ranger RZR ATV Service Manual, Page 337Get this manual
BRAKES Caliper Inspection
1Inspect caliper body for nicks, scratches, pitting or wearMeasure bore size and compare to specificationsReplace if damaged or worn beyond service limit
= In mmRZRRZR S: Front Caliper Piston O.D Std: 1.002" (25.45 mm) Service Limit: 1.000" (25.4 mm)
= In mmRZR 4: Front Caliper Piston O.D Std: 1.370" (34.80 mm) Service Limit: 1.368" (34.75 mm) 3Inspect the brake disc and pads as outlined in this chapter