2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 295Get this manual
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BRAKES SPECIFICATIONS
ITEM Brake Pad Thickness Brake Disc Thickness Brake Disc Thickness Variance Brake Disc Runout STANDARD .298"7.6 mm .150-.165"3.81-4.19 mm SERVICE LIMIT .180"4.6 mm .140"3.5