I just posted the same question on the Axys forum earlier this week. Did not really get a very good answer as to what could be causing it. Mine is a 163 Axys - Stock setup except I am running the helix carls recommeneded (42 I think) if not 40, and the bearing they add (whatever that is). I just adjusted my deflection before I rode - riding 6-8k elevation in about 18" of fairly dense powder on top of a good base. Pulled a few big climbs but not that many. Some long sidehills and that was it. Had cleaned my sheaves just before the ride and this is what it looked like at the end of the day.
Still wondering what the possible causes could be. Maybe I f'd up the deflection adj. I basically just broke the jam nut loose and backed the adjuster out 1/2 turn. Locked it back in place and fired it up to make sure the belt was trying to grab at idle - seemed good, did not hear any belt squeaking all day. Long pulls felt good, did not notice any belt fade.
