2007-2009 Honda TRX300EX TRX300X service manual, Page 262Get this manual
REAR WHEELSUSPENSION a-ring (from the inside of the brake disc flange) a-RING
Turn the rear axle bearing holder to obtain maximum drive chain slack (page 3-13) Remove the drive chain from the driven sprocketRemove the nuts, bolts and driven sprocket from the sprocket flange