Anyone here go? I'm a big time snowmobiler(when we get enough snow). We have four, all Arctic Cats. Don't really get too big with motors since there's not really any need for it, a '98 ZL 440 that has around 9,600 miles on it, a '99 Z 440 with around 7,500 miles, a '02 ZR 500 with about 2,200 miles, and we just got a used '01 ZR 440 sno pro(looks like brand new) with 1,200 on it. It now has around 1,400. That is an amazing snowmobile! Out of all of them it has the most horsepower since it was a limited build and AC pretty much only gave them out to guys that raced for them. Lucky for us the guy wanted to get rid of it, he used to ride ovals so they gave it to him. Picked it up for only $1000 so it was a great deal. I think it has 101 horsepower out of that little motor, the ZR 500 only has 97...they both scoot though! All of the sno pro's horsepower doesnt come until after about 7700 rpms so you gotta ride it hard in order for it to work, same with the suspension-its really stiff so the harder you ride the smoother it gets. I let a guy by on the trails today with an '04 Firecat 700 and he couldn't get away from me...and he was trying!
Pic of ZR 440