Wolfie
Is a lunp
OK, there it is. A US XX carries 6.3 US gallons. Still though, that only puts you to 195 miles at dry. I hit that regularly with more left. I went 223 last summer and just nicked on the fuel light.
Run out in less than 90 miles and also have done 205 miles with 6l left. The 205 was the most boring ride, I have ever done, where as the less than 90 was a bit mad, 2nd and 3rd gear chasing a mad bastid