for what it's worth I couldn't fathom buying any bike that I planned long tours in possibly less than optimal locale and climate if there was any reliability concerns.
Purchases of passion are for toys that you take on a 30min ice cream trip. Try pushing a 550lb adventure bike around the block
If you're planning to go to the middle of nowhere then a KLR is likely the best bet, or an old air cooled BMW. I wouldn't want to be some place off the beaten track with some engine management light flashing either.