Rebuilding a BMW R80 Airhead Transmission

Seven years ago I dragged this 1978 BMW R80 out of a basement in Massachusetts.  I immediately found out it had badly rusted cylinders and the pistons were frozen. I didn’t document what happened next, but the top end got completely rebuilt. The cylinders were sent out to be serviced and to accept R90 pistons,… Continue reading Rebuilding a BMW R80 Airhead Transmission