Why are people saying the globes don't act as gyroscopes? As long as the bike can't roll sideways on the globes, then they are gyroscopes just like wheels are.
I don't see an axle sticking through said globes. If there were, it would just be a really dumb motorcycle tire with lots of unusable tread.
Any gyroscopic effect generated by the globes while moving forward is entirely dependent on the shopping cart wheel keeping them from rolling sideways...
...waitaminute, I missed it. That wheel is fixed perpendicular to the forward axis. So the ball can't even roll forward without it slipping. Essentially, this is a motorcycle that can balance itself in place with no kickstand.
See, now THAT is engineering fail on the most hardcore of levels.
Goal: make a self-balancing motorcycle that requires no kickstand.
They submit that.
I submit a concrete brick wearing a fedora.
...I win. Neither entry functions as a motorcycle, but my 'invention' is more stable and reliable. And has a cool hat.