clutch face wear

[backonblack]

I have a 06 apex er with 2100 miles and when I was cleaning the clutches this weekend I noticed that the faces in the primary had groves wore in them about 1/2 way up the face and the alum. looks funny, like it was flaking off. Its all stock except cr10ek's and 144 studs.. My buddy has a 07 er all stock with 144 studs and it runs right by mine, its not even close and I use a gallon more fuel in 100 miles. Has anyone else had any problems with their primarys.
I appreciate any help.
Thanks:Rick

 

[backonblack]

ttt

 

[ROCKERDAN]

I have a 06 apex er with 2100 miles and when I was cleaning the clutches this weekend I noticed that the faces in the primary had groves wore in them about 1/2 way up the face and the alum. looks funny, like it was flaking off. Its all stock except cr10ek's and 144 studs.. My buddy has a 07 er all stock with 144 studs and it runs right by mine, its not even close and I use a gallon more fuel in 100 miles. Has anyone else had any problems with their primarys.
I appreciate any help.
Thanks:Rick

take some closeup pics of the sheaves....some Ive seen will have grooves down lower where belt sits at IDLE....but you are saying half way up....pics would help here.

dan

 

[Srxspec]

If you cruise alot at the same speed and happen to have some belt slip at that speed you will groove the sheaves. The 8DN is a hard compound and not forgiving to slipping the belt.

 

[canadianhunter]

What would cause this slipping? I have heard it while cruising at low speeds on my Rage. I've cleaned and checked the clutches and belt, but didn't come up with the cause. I do have my 2ndary set at 70 degrees.