Originally Posted by
cudak888
Agreed. That (Nevar or Stronglight?) chainring has a fairly aggressive tooth which is probably hanging up on the chain pins a bit too aggressively.
Bring the FD up to see if you can ease off on the angle that the chain gets passed onto the large ring at.
-Kurt
+1
The 53t SR chainring on my '76 is like this. I have to have the FD cage about 8mm above the teeth to make it work correctly.
It's been commented on, and I've adjusted it down, but then it doesn't want to pick up the chain.