Arctic cat tz1 darting problem?

I have a 2009 arctic cat tz1 touring snowmobile with a bad darting problem, any suggestions?|||Icy trails, powdery trails? What kind of skis? how are your carbides? how many studs in the track? is your track adjusted right? How are your stop straps? Any broken shock mounts? Are the skis aligned right, at least close to Parallel? steering linkage good? Could potentially be lots of things