I have seen it before but can't really tell, backpack fuel would be a great idea. I suppose you could run a short while if you had even a quart more oil than what is always in the engine., or maybe he just stores it in the cases, and it works like when our pumps leak.
A few more pics would help, but I have only ever seen a few views, need to see oil line area and rear axle. I suspect it has a rear disc, as there is a master cylinder in board of the left footpeg. I am thinking if it gets ridden its probably only in one or two gears