[QUOTE=lhbernhardt;10771655]Hey, here's a side note to this whole timing chain thing: I was examining the wear on the timing chainrings (they were made for 5-6-7spd systems) and noticed that they were worn on the leading edge on the front timing chainring and on the trailing edge on the rear chainring. This clearly indicates that the pilote was doing most of the work most of the time!

This is discussed by Sheldon Brown, who notes that this wear pattern in the timing chain
wheels is normal. If you think about where the CW under torque hits the chain it will be
obvious. This has the side effect that timing CW life can be extended by swapping the
stoker CW for the pilot CW now and then, of course best done perhaps at each drive
chain swap.