as we say in Russia . standing on the pavement I ski . whether skiing do not go, then I not a very nice person . nevertheless, this is an interesting concept.
or may be it is too early woke up like a bear-rod ...

No wheels= no gyroscopic effect= fall over.
Bouncing off that tiny seat onto the track= instant removal of all hemorrhoids.

Wambr, I always cherish your philosophical trivia.   It seems like something always gets lost in the translation, but somehow makes it even better.

Dave, yes, wheels on a cycle are gyroscopes.   This is why you can let go of the handlebars at 60mph and remain among the living.

arteacher wrote on 12/08/12 at 09:56:13:

and here's more about the benefits of a motorcycle the Main benefit of motorcycles is that they, by eating various hydrocarbons, contribute to the purification of the environment. For the year bikes all over the world destroy 950 thousand tons of oil, which had not come, motorcycles, would cover a uniform layer of all the forests, fields and roads and to make life on earth impossible.

In addition, motorcycles indirectly contribute to the intensification of natural selection among the people, destroying together with the individuals with the lowest response rate and the lowest IQ. Unlike other animals, devices and appliances that perform similar functions,motorcycles least likely to endanger the life and health of other people. Usually, when a man on a motorcycle fire alarms and then kills himself against the wall, the latter need only to a minor repair.

houstonbofh wrote on 12/08/12 at 20:37:02:

Those things get whatever stability they have from the width of the contact surface. That's why skidoo's have two skis.

They work...sell the kits here in my neck of the woods...

http://youtu.be/3IXzvkpyFCM

http://youtu.be/FE0jhFjzK0M

@EJID- ski bikes are a bit of a different beast then the monster Wambr posted up in the picture.  They are smaller and most importantly have a much smaller and narrower track, having a 4 1/2 to 5 foot track is going to make more contact with ground and making more contact with uneven surfaces. The wide flat profile of the track will also make the bike rock side to side on rough surfaces, this is why full sized snow mobiles have two skis.  

Comparing ski bikes to a modded HD with a full sized track and a raked out front end is Apples to Oranges.