vanguard138
Living Legend
I just looked at the specifications for the R3T and the tank size is 22.3 liters. That converts to 5.89 gallons which mean the tank size is just as it should be. I'm not sure where you got 6.9 gallons, but that is grossly incorrect. With that said, I can still travel further than any other riders I have ridden with. 175 miles is no problem on my R3T. I usually fill mine up before 150 miles just for a margin of safety. I make a point never to run out of fuel for the obvious reason, but fuel going into the cylinder has a lubricating and cooling effect on the cylinder walls and pistons. My brother actually squeeze/scored a piston on his BSA years ago by running out of gas. It's just something you should never do.
I usually top of around 150 just to be safe. Not an enthusiast of running out a few milea from available fuel.