Polaris TRAIL BOSS 325 2001 Manual page 211

CONCENTRIC SWINGARM REAR AXLE ASSEMBLY, CONT.
4. Install foam seal and axle nut lock sleeve with
taper toward nut. Install snap ring to retain the
lock sleeve.
Foam Seal
Snap Ring
Lock Sleeve
(Tapered side toward nut)
FINAL DRIVE
7.11