2005 Polaris Sportsman 400/500 Service Manual, Page 256Get this manual
BRAKES 5Install brake line and tighten securely with line wrenchTorque the brake lines to the proper torque specification6Follow bleeding procedure outlined on Pages 9.6-9.7 of this section and refer to system overview and illustrations on Pages 9.29.37Field test unit for proper braking action before putting into serviceInspect for fluid leaks and firm brakesMake sure the brake is not dragging when lever is releasedIf the brake drags, re-check assembly and installationCaliper Slide Pin
REAR BRAKE DISC INSPECTION
1Visually inspect disc for scoring, scratches, or gougesReplace the disc if any deep scratches are evident2Use 0-1 micrometer and measure disc thickness at different points around perimeter of discReplace disc if worn beyond service limit