Bags are here, and Jafum was VERY VERY optimistic in their measurements --- original concept will not work out, but new dual containers are on order, balanced with one container per side, giving much better balance, having the same gas capacity and giving roughly the same space for carrying other stuff.

Because of the Jedi training I have gotten, I simply looked to the Force to show me the relationship between hidden gas jugs, fuel pumps, and really big saddlebags.

I carry a lot of junk in the small saddle bags that are on my Savage right now, and my junk includes a gallon jug of gas for when it is just too too far to the next gas station.  

This IS something that occurs regularly up on the Blue Ridge Parkway and we did get bit once on an aborted trip to the top of Mount Pisgah as I can get some really rotten gas mileage on my Savage due to several very good reasons, with my overactive right wrist being just one of them.

Run this thought along for size, expand the size of the gas jug from one to 2.5 gallons, then putting in a 2.5 gallon jug into each of the very large right and left saddlebags.    

(actually leaving more empty room still left in each bag than my current saddle bags even have in total)

.... and also tossing in some jug based fuel filters, manual shut offs and a hand pump bulb that is used for evacuating the trapped air from the ups and the downs of the gas lines that are integral in this sort of low mounted system  ---  air evacuating that will have to be done at each full fill up, BTW  ---  then you have a fuel pump suction drawn fuel system by which I can draw on 5 gallons of gas hidden in the saddle bags using the 3-6 psi fuel pump that comes stock with the Intruder and only using the 2.5 gallons in the gravity fed gas tank as my primary reserve (and a secondary 20 mile reserve should I actually run it all down that low).

7.5 gallons of long running trip gas ....   and that is with still having the 20 mile reserve built into the normal gas tank.   300-350 miles on the full rig up, which not too shabby for $60 invested in jugs and fuel line and misc hardware.

     ..... at a materials cost of less than a third of what MM is paying for his new, unpainted, "will need a lot of modifications" steel gas tank all by itself.

Plus, if I want to be all nimble when I get there and I decide I don't want to be swinging around the roughly 50 extra pounds of "totally filled up" gasoline, well then I can just fill up the top regular tank and shut off the empty bag jugs after I suck them dry (or I can take out the jugs and use the funnel by hand if that is what is needed)

And, if you are with me and you run dry on a long stretch I can take out the funnel and one of my gas jugs and pour some gas into your tank so we can all make it on down the road to the next gas station .....

Amusing thought, since I have a fuel pump I could rig up a little 1/4" rubber filling hose and pump the gas over into your tank -- but that would just take forever.

Big jug, funnel ....  quick and messy.

Tank bag with a fuel blatter ?   I'm carrying extra in both saddle-bags now (balanced).  

I'll give the 4.75 gal. tank a go after Christmas.   (w/pictures)

 Dreaming   300 mile range .  

I would most likely just install a sold state fuel pump to transfer the fuel from the saddlebags to the main tank.  You would plumb the left/right saddlebag tanks together, then run the line to the fuel pump, and then T the fuel line just below the tank/petcock.  The solid state fuel pump has a check valve inside, so no fuel should flow from the higher tank to the saddlebag tanks.  When your main tank is running low - you would just switch on the new fuel pump and transfer fuel to the main tank.  The amount of current required is very low for the sold state fuel pump, and the only thing you need to remember is to shut it off when you have moved enough fuel.....there would not be any auto shut off.

Here is the "standard" for the sold state pumps....you might be able to find a copy that is less expensive.

https://www.amazon.com/FACET-SOLID-CARBURETED-ENGINES-GG42034103/dp/B013SG7M9E

Here's the jug .....

OK, so this is how you add a 1/8" thickener plywood backing to the bag, so you can hard mount it to the frame.

The clamping method is sorta a "bullet caster" methodology ..... but it holds it together firmly with no relaxing for the full 24 hour curing period.

The construction adhesive stuff is the premium, 3x stronger  variety -- the good stuff.