A buddy of mine had the same clicking in the rear end of his. We simply tightened the spindle nut to fix it. the dealers seem too quick to diagnose the problem as a failed bearing. his front end did the same thing two days later. same thing fixed it. mine now has the clicking after 1000 miles of really hard abuse. tried to tighten the nut, but it was no use. the damage appears to have been done. these are, all in all, some baddass machines, though. wouldn't get too discouraged, guys. the fix usually is something minor.