Never.......and before my grizz I had a 2000 Kodiak auto and in 7,500 miles I never had a belt problem with it either(I did install a new belt at 5,000 miles on the Kodiak for piece of mind being it was my 1st belt drive quad)

 

wow do you still have it running on the stock belt?
how hard is your ridding?

 

My Grizz is still on the stock belt....it should be good for another 1,500 miles.
Check out this link......I dont ride easy. PIC'S