[SV650rules]

I always refer to petrol or diesel as Dinosaur Juice because they are not as clean as they look and when they evaporate they leave gummy lacquer residue behind, both inside carbs and on injector nozzles - this is the remains of old plants and trees, dead sabre toothed tigers, mammoths etc. in fact whatever was there to decay and turn into crude oil.

Petrol that is left untreated in bikes (or even stored in cans for a while) can lose its more volatile compounds which are the ones that explode most easily, so this makes engine harder to start, but the same evaporation leaves residues behind that can block things up and stick things together inside the fuel system, neither of which are helpful.