Is that a one-off engine? I thought Sachs was known for making rotaries for snowmobiles?
Or did you mean a one-off Hercules with a rotary? Lol
Bet that thing leaned one way really well, with the mass of the rotor spinning at thousands of rpm, and probably stood right up when you let off the throttle.
I'm a huge rotary fan (have owned a couple RX-7's), and rotaries on bikes seem like a great idea - except for fuel consumption and that rotating mass issue.