Here, in 1913, motorcycle company Harley-Davidson decided that winter motorcycle designed for ice roads - there is a niche market. And quite original unit built almost real ice bike. Note: the normal drive to the rear wheel. Wrap the chain wheel (or two?) Complemented by two side-skating skis are protected from falling through mover in loose ground, and dual front ski provide acceptable stability and controllability. Basically, a viable solution, but here's the problem: it was suitable only for sufficiently good (smooth and without a lot of snow) ice - in all other cases and could easily stall and just lose control.
Found on http://strangernn.livejournal.com/820861.html
