WTF is the "fuel tank prop stay"

i use a bungee wraped aroud a beam in the garage

I have got the prop, but these days I prefer to remove the tank anyway. It's only 3 pipes (on the curvy anyway) , be careful pulling on these though, and the electrical connector for the sender. More room then and a lot more light too IMO.

Ok I don't think I'll worry too much then

I used an old oil container last night and I might make something up.

Point taken about taking the tank off. I will in future I think, particularly if I start playing with air filter, snorkle etc etc. I'm used to taking them off other bikes to work on them, kinda neat that you don't have too though.