Have just taken on a1984 750 Virago, it has been standing for 5 years, decided to do an oil/filter change, and found out there was 6 ltrs of oil in the bike, twice the amount stated in the book,there is no OFF on the fuel tap, so, would any fuel that was is in the tank, drain into the sump?? Why is there no OFF position on these taps? hope anyone can help, thanks Mac