6.25 litres/100km at 535

Hello Biker, after the winter break my Virago has more than thirst at 6.25 liters on 100 km according to my taste. In addition, after quite exactly 160 km was finished and there followed a “slide” up to the next tank. However, only 10 liters went in and then the tank was brimful. Viragos with year 05.94 should nevertheless have 13.5 liters total volume in the tank. Where remain there the approx. 3.5 liters. The next problem was, when after about 5 min. duration, after I had switched to reserve, the part finally got to run again, the believed reserve volume of at least 2.5 liters only for approx. 300 meters and then was again concluded. And as already mentioned, then the “slide” has one of you similar experiences and knows advice? Thanks already for your “support”