In all my bikes -well, but the CB750- I have done a reserve test: once your switch to reserve write down the odometer reading, load a can of gas and ride the bike until the tank is dry. Then you know, on a controlled situation, how much can you expect from your reserve.
Couple years ago on a rainy day I was driving home with my little daughter behind when I noticed an stopped bike on the right side of a three lane highway - but with another two lane beyond the concrete fence. No way to get out of there unscathed. Worst of all, by the body shape and the hair under the helmet it seemed to be a girl. And I'm yet to see a girl who is a good mechanic -sorry if I offend somebody but that's my experience-
Anyway, I knew she was in danger if some driver didn't have the time to swerve her. And I didn't want to listen in the news that somebody had got killed. So as soon as I could I turned back and got down the road again. My plan was to stop the car way ahead of her -as a car is easier to spot and represents a bigger obstacle- and put some reflective triangles even way ahead. Some part of me was hesitant whether I was doing the right thing: my little daughter was sitting behind and I was leaving her on a car, stopped on a highway. But I felt it was the right thing to do.
Long story short, the girl has run out of gas and had already phoned his dad. He came in a luxury BMW, and though he was somewhat grateful, he didn't showed more appreciation than when giving right of way deserves -not that I expected any-. Seems there is people so little used to need help that they don't know how does it feel to be in need from others. The girl, on the other hand, was really appreciative, I guess the feeling of somebody stopping made her feel safer. She insisted she would babysit my daughter anytime for free, which I refused. I even refused to write down her phone number. I told her: maybe some day my daughter will be caught in a situation just like you, and when that day comes, I hope somebody will just stop and help. Until that day comes, just pay it forward!