2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 172Get this manual
BRAKES SPECIFICATIONS
General Brake Specifications FRONT BRAKE
Item Brake Pad Thickness (Includes Isolator Shim) Brake Disc Thickness Brake Disc Thickness Variance Between Measurement Brake Disc Runout Caliper Piston Diameter Standard .296"7.5 mm .157"4.0 1.187"30.15 mm Service Limit .180"4.6 mm .140"3.56 mm .002".051 mm .010".254 mm
REAR BRAKE
Item Brake Pad Thickness (Includes Isolator Shim) Brake Disc Thickness Brake Disc Thickness Variance Between Measurements Brake Disc Runout Caliper Piston Diameter (Sportsman 300) Caliper Piston Diameter (Sportsman 400 H.O Standard .296"7.5 mm .157"4.0 1.187"30.15 mm 1.250"31.75 mm Service Limit .180"4.6 mm .140"3.56 mm .002".051 mm .010".254 mm -