Why not just carry a CO2 inflator and some spare cartridges? Easier to press a trigger than crank on some hand pump 200+ times to try to get a tire full of air if you're dealing with a completely flat tire. Must say, I have one somewhere but have never used it and don't know exactly how many cartridges it would take to completely air up, say, a rear KLR tire. I would think 3 or 4 would do the trick as long as you got a good shot through the valve stem and didn't waste any.
Doesn't answer your question, though. Somebody on here (Cabrito, perhaps, if I may be so bold?) has related tales of using a bicycle hand pump to at least air tires up and down for off-roading. Hopefully folks will chime on with their experience with such things.