2009 Polaris Outlaw 450/525 Service Manual, Page 155Get this manual
BRAKES NOTE: Brake fluid will be forced through compensating port into master cylinder fluid reservoir when piston is pushed back into caliperRemove excess fluid from reservoir as required4Push upper pad retainer pin inward and slip brake pads past edge"MXR""S" Shown
Pad Installation
1Lubricate mounting bracket pins with light film of Polaris Premium All Season Grease (PN 2871423), and install rubber dust boots
25Measure the thickness of the pad materialReplace pads if worn beyond the service limit