There have been numerous successful experiments with fluid drive systems on the front wheels of motorcycles to come up with two wheel drive on them. Problem has always been added weight and added power requirement.
IMHO, you will be better off trying to build a modern shaft drive system for a bicycle, specially with the lighter materials now available....Uhmmm......maybe hollow CF shaft and drive housings and light alloy geartrain parts......you might even be able to get rid of most lubrication requirements with the right materials.

Chombi