So, my 2000 FD 700 had some issues with keeping it going in a straight line down the trails. One problem was my carbides were pretty much non existent. I replaced them, it helped a little, at least now I can turn. Added some shims, it helped a little more. Now that I got that resolved, at least I think I do, I can't get it to "hook up". My rear end just seems to do nothing but spin and fish tail. A few friends that I have in the snowmobile community say that I need to stud my track. I can kind of agree, but then disagree. Before, the carbides that came on my sled seemed to do the job, and I never noticed that I was doing much fishtailing, if any at all.