Have a look at the Crighton *CR 700W over 200bhp and under 130Kg, OK they're only making 25 initially and they are quite expensive but Brian is looking at possibly making a road version.
* Brian Crighton was the guy behind the Norton that won multiple championships as the JPS Norton and was the last British bike to win a TT with Steve Hislop beating Carl Fogerty.
In a world where reciprocating engine technology has been developed to be relatively cheap, plentiful and reliable, and the rotary piston engine didn't manage to become widespread enough to bring costs down enough to have a self sustaining network behind it before emissions regulations made further development uneconomic, it's just another footnote in history. They were always uncommon unlike for example two stroke motorcycles which
were everywhere at one time for the utility rider. It's likely that many more people could afford a Francis Barnet Plover than a Norton Atlas back in the day. Due to emissions regulations, very few two strokes are produced now and they are around 50cc.
If history had taken a different turn who knows what might have been the commonplace technology now. Feet first super lightweight turbocharged diesel motorcycles? Gas or steam turbine technology?
With the future of vehicle technology being most likely battery electric or hydrogen fuel cells or something as yet unimagined the era of significant develpment in internal combustion vehicles is probably over.