As you may have guessed, the economic downturn and two world wars sandwiching the decades when motorcycle chariot racing was invented probably wasn't a great time to introduce the sport. It quickly fizzled out just about as abruptly as it arrived, which is super unfortunate considering how cool it is.
https://www.thedrive.com/news/38365/motorcycle-chariot-racing-was-a-real-sport-and-every-bit-as-glorious-as-it-sounds
🥺
Sounds like its due a resurgence.