Thanks guys for the input or perhaps that should be tanks for the input.
Good to know that petrol is in fact lighter than water.
I am the same at fuel stations dribbling the last drop of gas in so that the tank is brimming, that last few pints can take a life time to get in, you think it full and it seems to settle back down the filler neck.
Thinking about the bike getting away from you whilst holding/manouvering it in tight places or even worse while sat on it on a angle/slope sideways on and your foot goes down on grit, gravel or debris from trees etc with a full fuel tank it really does make a huge difference to picking the bike up.
Someone told me if you can turn the handle bars down so that the lower side is nearer the middle of the tank and lift with the other hand on the grab rail under the seat fairing it is meant to be easier to lift. I have to admit to struggling to get the old girl upright again each time my bike has gone down, Weak wrists, classed as Rotation & Impact damage years of swinging pick axes and sledge hammers and kango type electric and compressed air breakers.
I am very strong and fit for a seventy year old but my wrists let me down.
Poor old fucker.