Originally Posted by StephenH

Through the years, there has been a 2-wheel-drive motorcycle available, although I forget the name of it. I understand with normal off-roading on a motorcycle, you go up steep grades using lots of power and spinning. With the 2-wheel driver version, you can go up slowly. Different way to accomplish similar results.

I've wondered why someone didn't do this on a bike, and didn't realize someone had. It would have very little practical benefit, but would still be cool to have if done well.