94+ have the 'adjustable' look to them... the sprocket itself is a separate piece from the hub. Also the O ring on the front is smaller diameter (not cross section diameter), subsequently, I think the front screw on cover is smaller as well.
Later
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the universe." -Albert Einstein
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?