Desert Fox fuel bladder. Don't often need it as my GS has a range of 350 km, but on occasion (Tanzania, Bolivia spring to mind) it's been reassuring to have that extra gallon or so. I empty it at 100km, roll it up and store it in my Mosko Backcountry 35s 'beavertail' . Weighs next to nothing.

Interesting thread resurrection, and one of use to many I suspect. It's certainly one that I've given some thought to as I bought my current bike (790 Adv) with Central Asia in mind, where fuel supplies may be some hundreds of kms apart. I calculated from actual fuel consumption that I should be able to get 430 kms on the road just from the fuel tank, and carrying a 6.6L Rotopax brings me up to 580 kms, which should see me through for most purposes. I reckon I could stretch that to 600 kms on a flat road keeping the speed down.

I've mounted the Rotopax on the left pannier frame (soft bags) as this makes the width on the left the same as on the right, where the frame sticks out to clear the exhaust. Conveniently this leaves some extra space on the inner side of the left pannier frame to add a Givi S250 tool box. One of the nice things about this arrangement is it keeps the fuel weight low. :)

Fyi, the OP from this thread gets regularly updated as I come across new ideas and solutions.

https://adventure-motorcycling.com/l...-motorcycling/.

fuel bags
 

What is your opinion on the Desertfox and Armadillo fuel bags, have you ever used them?
I was thinking of buying a 6L or 2Gal one for my next trip.

I have not used the Desert Fox or Armadillo but 6L is a useful volume.
I have carried a similar 10-L Liquid C bladder on my trips, though never needed it.
In the UK it looks like the Desert Fox from Nippy Norm is better value, or at least available.

It's surprisingly cheap compared to other european sellers! about half priced.