Street Twin Tank Range

I'll watch this with interest as I've often wondered how far can actually be squeezed out of a Street Twin (or in my case Street Scrambler) tank.

Can I suggest though the only way to be sure is to get one of these

https://www.motorama.it/en/givi-tank-2-5-lt-P18397.htm

and go find out on your bike.

Enjoy the trip, I've done it a few times (though have more often taken the 870 mile route in a day rather than the 1500 mile route)

 

I easily get 60 mpg on mine. On paper that is 180 miles on a full tank. But I also don't ride too aggressively. To be safe maybe look for gas at 130-140 miles.

 

I think the lady in MCN doing a long-term test was getting over 150 miles per tank. I'm cautious like you, and tend to take the next filling opportunity after each 100 miles.

 

I always carry spare fuel in one of these.... https://www.ebay.co.uk/itm/Primus-F...757456&hash=item567063189b:g:ZRgAAOSwBahU1MxN .....when out on the dirt bike, ever since running out on a track over open moorland, it fits nicely into a small backpack.
What a nightmare that was. I haven't bothered doing so on the Street Scrambler as I find the fuel gauge pretty accurate. I've done over 15m with the fuel light on a few times without drama.
Interestingly, Triumph quote a slightly higher MPG figure for the ST vs the SS.

 

Obviously will depend on your riding style, speed etc.
My street twin gets typically around 3.6 l/100 km giving a potential range of 320 km or so (198 miles).
I generally fill at 280 - 290 km.
This is riding a mix of local rural country roads and commute to work.

 

I got a new one recently, been keeping an eye to see what range I'm getting. Most I've done on a full tank is 125 miles, the light was on for the last 10 of those.