RE: hoyt trykon
I don't have a Trykon, but I had that happen to my Switchback XT. It is at a point where there is a lot of pressure placed on the string from the cam. I just had that part reserved. I think it cost all of about five bucks. I had the bow for about nine months before I had it done. I figure if I have it reserved once a year, that is not to bad.
-edit
I will probably be replaceing the string next year, anyway