Chopper Motors

I was never much for choppers but the Yamaha TX750 "chopper motor" in the lower right corner caught my eye. The ad is from the Feb. 1976 Motorcycle World magazine, the TX750 was introduced with great fanfare in 1973 only to be immediately panned for problems related to the "Omniphase" balancer system. There was also a exhaust balancing manifold in the front of the head which couldn't have helped engine matters by blocking airflow to the head. Anyways, a couple of years later the bare engines are available as chopper fodder. I wonder if these were a bunch of unsold engines from Yamaha or from unsellable bikes that had been already broken up.