i had a '94 ZX2R C best i got was going to and from the GP..
297k's to reserve.. filled up at about 342k's
Dunno what was done to the bike, but it had a full race system on it...
and that was mostly highway riding, without to much stop start.. sitting on about 100-130 most of the time when on the h'way
I was pretty impressed when I hit reserve and realised how many k's i'd done.