2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 278Get this manual
BRAKES SPECIFICATIONS
General Brake Specifications FRONT BRAKES
Item Brake Pad Thickness Brake Disc Thickness Brake Disc Thickness Variance Between Measurement Brake Disc Runout Caliper Piston Diameter Caliper Bore Diameter Standard -.187"4.75 mm 1.186"30.12 mm 1.192"30.28 mm Service Limit .040"mm .167"4.24 mm .002".051 mm .010".254 mm 1.184"30.07 mm 1.194"30.33 mm
REAR BRAKES
Item Brake Pad Thickness Brake Disc Thickness Brake Disc Thickness Variance Between Measurements Brake Disc Runout Caliper Piston Diameter Caliper Bore Diameter Standard -.187"4.75 mm 1.250"31.75 mm 1.254"31.85 mm Service Limit .040"mm .167"4.24 mm .002".051 mm .010".254 mm 1.246"31.65 mm 1.256"31.90 mm