Griso reserve tank

Does anyone know how many miles you get if you take it really easy once the Griso 1200 SE reserve fuel light comes on? Found myself in a North Norfolk petrol station black spot today & nursed her gently for 26 miles until I found one open. Didn’t fancy having to push her, I’m haunted by the memory of a fully laden Bellagio running out on a French motorway.

It depends what mileage you are getting. I used to get 48-52 on long runs below 80mph and i got 40 miles on reserve once.
Assuming Guzzi made the tanks the same (?) less mileage = shorter reserve