The parts list I can find, shows:
55 or 65 pilot (but not 60?)
and
165, 168, 170, 172, and 190 mains (again, a bg gap in the sequence - go figure)
and
R1366N, R1367N and R1368N needles.
FWIW, my 88 KX250 required significant leaning off to be happy on modern fuel. Based on that experience, I would aim for the leaner jets as the starting point (assuming your mate is smart enough to identify a lean-running two-stroke before it destroys itself...).
