I carried 25L - with the two safari tanks, I never ran out of fuel, and on day one and day four I gave about two litres of fuel to my follow riders.
I did not have any issues with my bike what so ever, no electrics, no fuel pump

, NONE !!! I ran standard WR450F, without oil cooler or radiator fan. The only things we raplaced on my bike daily, was oil, oil filter and clean air filter, ................. That's it!!! I must say I was very happy with my bike and the way it ran.
I did program the ecu with the standard AUSSIE map, wich you can get of the net easy peasy............. that did make a BIG difference on my fuel consumption I suspect!