1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 193Get this manual
REAR WHEEL BRAKE DRIVE MECHANISM
AXLE INSTAL LATI ON
Insert the axle into the bearing holder from the left side,
Make sure that the dust seal on the brake drum
cover is in good conditionReplace the dust seal with II new one, if necessaryApply grease to the lip of the dust seal