I think the mechanic was making an excuse for the very inaccurate fuel indication that fluctuates as the fuel sloshes around the two tanks when you corner. You will have more than half a tank of fuel left when it starts to show 0% if it has the original tank sender still. As I am sure you are aware there is a 280mm version that improves the accuracy a little. Nice looking Brooklands.
I installed the 280mm at new and it's become just as inaccurate as the original now. Reads 0% after about 120-130 miles. That's about 1/2 tank.
