I would love to ride an NSR250 around Phillip Island. However, I cannot help but think that something with a little more power would be more suitable. (But isn't it always I suppose )
I can understand how the power output of an NSR can play a role in determining the best gearing for Phillip Island.
If I had to guess I would say 16 tooth front and 43 tooth rear for a 60 RWHP NSR250. But that is just a guess, aimed at provoking others into responding.

I hired a PIRD GSXR600 a few days after the MotoGP two years ago.
I also was a little disappointed with the guys running the event as well, but they have their own interests to protect I guess.
Also the power modes on the GSXR were dis-enabled and the (brand new) bike got noticeably slower as the day went on. Hmmm.

Anyway, Phillip Island has the fastest average speed of all the tracks on the MotoGP calendar I believe. Please correct me if I am wrong.
Unexpectedly, my favourite corner was Hayshed (turn 8 ), but Stoner (turn 3) was also brilliant. Just my 2¢.
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[color=#808080][size=9]Yes,.. I too know how to waste Time and Money,...