I just have been reading more and more vintage bike news and thought it would be a good idea to post more on this topic. Here is a super clean and perfect Kawasaki K100 2 stroker show winner here.
http://vintagebikeoc.com/bikeofthemonth/
I've never seen a rotary valve bike let alone seen one run. I guess they sound the same and run the same? Seeing how Kawasaki says they are really efficient maybe they don't burn as much oil?
"According to Kawasaki, the two-stroke, rotary valve KH100 B7 has a top speed of 75 mph and fuel economy of 60 mpg."