I put a set of flex skis on a 98 formula dlx 583. all I did is measure the distance from the ski saddle to the spindle and want to the hardware store and got some bronze bushings9/16 IDx 3/4x OD 3/4 wide x 1" with a shoulder on one side and some longer metric bolts cause the saddle is wider. I think I spent $12 for the set up instead of $50-$75 from doo, it might even be more from doo. It's not that bad you need a good hardware store though.
I put them on my 96 F III, got the whole shebang including mounting kit and carbides for $400 from the dealer. They work nice on my sled contrary to belief, but I also have a heavy front end to keep them planted in the corners.
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