IIRC...
Yamaha's 1972 250 stroke twin was a DS7, I had one, along with a few other 2 strokes, then a bunch of Triumph 650s and 750s and Yamaha XS650 (the Japanese Bonneville). Still have a '73 Honda CB125 in the shed that I need to get it up and running again.
Suzuki still (I think) makes a...