I did. See my CDI thread. My one spark plug wire going into the CDI/coil pack (whatever everyone calls them) was literally hanging on by a thread. It ripped off when I was adjusting the wire keepers. Replaced it with a used one that I had JSS do their service on.
What year/make is it? An sx or and x2? Also, what do you mean the plugs are "b.n"?
I believe you need a BR7ES for these skis