I did the sanding trick and the clean the pads trick and took needle nose pliers to the star nut and worked it in as far as I could while pulling the clutch lever. All that kept the clutch working for a few hundred miles till the motor mount bolt broke off at the block.

The set screw does go between the tabs of the nut and it can only back out so far before it hits the screw.

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LennyHarp of Lenny's Bikes & Things
http://lennyharp.net
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle