2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 407Get this manual
ELECTRICAL STARTER DRIVE
Pinion GearAnti-Kick Out Shoe, Garter Spring Replacement
If the garter spring is damaged, the overrun clutch may fail to return properlyUse either of the following methods to remove and install new garter spring:
H AGear Assembly BThrust Washer CBushing DRetaining Ring EThrust Washer FStopper GCover HSpring E