2004-2006 (2007) Honda TRX400FA Fourtrax Rancher / TRX400FGA Rancher AT GPScape Service Manual, Page 325Get this manual
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BRAKE SYSTEM Install the brake drum cover and tighten the bolts securely
Further tighten the hub nut until its grooves align with the cotter pin hole in the axle shaftInstall new cotter pin and