Hmmm. I've seen a 1988 F3 NSR. It had a dry clutch, which I assume is a 1989 unit. It had the flash electrics, Mega ported cylinders, TDC heads, HRC airbox and pipes (with the special linkage rod).
Also had SP front suspension off an '89 MC18 or a MC21, alloy lower triple clamp, and F3 shock-it has the ride height adjuster as well as preload, rebound and compression.

What are the ratios likely to be in the gearbox if its an F3 unit? Anything to look for?

Cos I got the dry clutch bottom end out of it when they blew it up, and I was told it was a special close ratio box...
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The Chopster