A nice surprise

[700rpm]

Three or four years ago I had my Tudor engine rebuilt by a local reputable Model A guy. But it never felt quite right to me; though it had a lightened flywheel and balanced and weighted crank, it felt out of balance. I talked to the builder, and he assured me everything was as it should be, including the balance. Two weeks ago I took it on a long tour, and it had what I would describe as a harmonic vibration at about 27 mph and 47 mph, and the usual uneven feel at all speeds.

I couldn't stand it any more. Last Friday I pulled the rear end to check the balance marks on the crankshaft, flywheel, and pressure plate. To my surprise, everything matched as it should. I put it back together -without changing anything- and took it for a long drive today.

And what? Now it runs smoothly and with none of the previous vibrations! I'm pleased, but I can't figure out why it turned out that way. I didn't do anything but take it apart and put it back together exactly as it was before.