I just bought a 06 660 and it's going to take a little getting used to. I'v rode Quads for many years but this thing seams to go where I wouldn't ride a quad. This has 635 miles on it and was wondering when you need to change the belt. Never had a belt drive so don't know anything about them. I belonged to Arctic Chat Forum and got alot of good info there. I hope this site is just as good.