FWIW, there were built-up cranks used on some early motorcycles and other
small engines, as well. Some single-cylinder engines had press-fit crank
throws.

Quite a few still do.

And many of the current crop of small 2 strokes don't even have the
second side of the crank. They just have the crankpin sticking out with
the rod slid over it. Just like many of the model engines are made.


--
Ed Huntress




--
Steve W.