How do you improve the motorcycle? Why, get rid of everything it doesn't need! Including the second wheel:
And here's the modern iteration of the one-wheeled cycle:

Click the image to see the story.Personally, I'd prefer the Dynasphere. Okay, back to work....
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How do you park it? Lay it back on that chrome doohickey?
The Dynasphere makes me giggle...
Hamster Ball for humans!!
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The practical mind of mine says "yikes" if you ever have a blowout, that might hurt.
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K.
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I don't know if you are a South Park watcher, but those remind me of a invention Mr. Garison made which was quiet humurous :0)
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Turns out, they added a second wheel because the gyro-stabilized unit was too unstable above 20mph.
So now it's a Duo.
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Hey, maybe he'd sell it to me for a dollar now....