Originally Posted by Sheldon Brown
My guess is that the synch chain is loose. The bottom (slack) run is swinging back and forth, and the end of the stoker's crank can sometimes snag it.
Dayum Sheldon, I never thought of that.... I may have a little too much slack in the timing chain. When I get home tonight, I am going to see if there is enough side play that it could catch on the stoker's crank...
Thanks!