Another thing from my visit to a Mecum Auto Auction.
1966 Bat Bike!
Based on a 250cc Yamaha Catalina, there were 4 of these made for the original show. It included the really weird detachable side car(literally, a tiny car) that Robin rides.
They added a filler cap to the sidecar, but no motor or running gear, but they did included a fake exhaust pipe. So it was TV ready, but otherwise less exciting than it could be.
Who wouldn’t love a handful of horsepower on a 40 pound toy 2 inches off the ground you ride face first?