Originally Posted by Dirtdrop
I believe the caveat about the old French headset/stem dimensions still stands.
Twist, shove, twist....you can sqeeze a regular stem in there. I'm was able to twist a Japanese stem into my (late 70s) Motobecane headset with no real trouble. Its so tight I hardly need a stem bolt. I can pull it out, although it takes more twisting and pulling...but this is not a major setback. The obsolete bb threading is more of a PITA that the headset peculiarities.