Dong Fang DF 250 RTB Bobber Information

[axa]

1/64" = 0.0156"

I have a new 167FMM head casket that has a steel ring that appears to be 1 mm thick uncompressed.

1 mm = 0.0394"

So using your thin gasket material might give a gain of approximately .020" without milling.

Hmmm

0.015625

.01562

try it!
http://www.amazon.com/Fel-Pro-3045-Gasket/dp/B000CNKUGE

not quite as forgiving on untrue mating surface, though i dont image its a huge problem.

you might try this a bit first if you dont have access to a mill.
https://www.youtube.com/watch?v=dNdaJs2AkUg