Cooling?
The rotaries run mighty hot, and I am pretty sure that thing would cook in traffic. Even my little Hercules (Sachs) air cooled Wankel, with all of 25 RWHP (or so it was claimed), seemed mighty unhappy to sit there idling or poking along in a traffic jam. With the air scoop on the bike shown, it might have enough air flow to keep the temperature within limits, at highway speeds, but most of us have to slow down to ride home and park.
Norton and Suzuki also made rotaries, with more substantial radiators. It's interesting to note that neither one is available, today.