If i remember correctly, there was another similar sized model which was powered by a Royal Enfield Constellation 750cc motor cycle engine. I am sure that it would have been a lively little car to drive. I can't remember how reverse gear was arranged, certainly not by rotating the engine/drive wheel combination as in the Bond of the same era.
"It sure looks fun to drive, though, even if it would practically disappear into every blindspot of a modern truck or SUV." When I was in high school (late 70s), friend's older brother had a Honda Z600. It frequently displayed new gray body panels and ultimately got sold as the driver got tired of people bumping into it while parked. Just too small to be seen! It looked like a fun car, though. They pretty much disappeared by the time I could have bought one, though. I did end up buying a Honda Civic wagon from a friend's girlfriend's brother, not running right ($50!) I redid the cylinder head (remember the three-valve CVCC design?), which only demonstrated the rings were bum, too. Hoped for economy over my van did not appear, I burned so much oil (costing 4x gasoline) that it offset fuel savings. It was a nice drive, though, with a classy design for a 70's economy car. Ended up selling to "a guy", with careful explanation that oil needed to be checked/filled every day. Sure enough, later that year I got a call from a junkyard trying to pin some fees on me as the last name on title - abandoned with burned-out engine! No problem back to me, though, as I made sure to properly report the sale at the time.