There are not too many bikes that I would consider riding two-up and loaded with gear on such a ride. The DR650 is not one of them - but it is an excellent solo bike when properly prepared for such a journey.
Does your lady friend ride? If not, is she willing to learn? If the answer is yes to either, why not take two DRs (there are benefits to two identical bikes - eg consolidation of spares) and enjoy the trip? If the answer is no to both then a more suitable bike is in order... or leave the lady behind.
BTW, my wife learned to ride so that we can both enjoy and share our adventures.
Mike, power is not an issue if the bike is geared and ridden appropriately. A ride like this (done solo) could just as easily be done on a TS185, but it would be ridden slow (70-80kph max?).
Last edited by AndyL; 30 Mar 2008 at 18:15.