2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 219Get this manual
CLUTCH SYSTEM 3Install the small and large retaining rings into the outer sheave above the bearing5Install the roller (A) onto the roller pin (B)(Both Sides)6Install the roller pin into the sheave assembly(Both sides)The flat side of the roller pin faces downward when the shaft side is laying flat on the benchLine up the "X" on the moveable sheave with the "X" on the stationary sheave or use the marks previously usedPut the sheaves together