I tried out a couple KVF650's
 

I stopped down to my buddies house on the weekend and helped him change the fluids in his KVF650. I took it for a rip when we were done and I am quite impressed. It rode really nice and had LOADS of power. I drove another one there that had 27" mudzilla's on it and it was impressive as well. Both are 2002's and they both seem really happy with them. I asked him about the reliablity and he said he has had only a few problems but the one with the mudzillas is a lemon from what I gathered.

They both have suffered from clutch problems and something with the 4 wheel drive engagement in the front. Both have been in a couple times. That said I think I would still buy one. Any auto that size, that can wheelie with a 275 pound guy on it, is alright in my books hahaha.