Probably stories told by people that are ashamed they were negligent and had their bikes standing for years and years unattended. Some owners choose to drain the floatbowls every year before hibernation. Over time they can expect dried out and deteriorated O-rings, in particular the little O-rings around the main jets and the O-rings around the T-joints. Leaving gas in the carbs for too long (years) isn't good either, so we face a dilemma. What works for me is: leave gas in the floatchambers, but drain them say every two months (gas can be poured in the tank again). Then with empty floatchambers and the big Idle Adjustment Screw turned a bit loose (to fully lower the carbslides), kick the engine a few times to suck the jets dry (I hope). Closing the chokes may help to create underpressure. Then open the petcock just to refill the floatchambers. This gives me the best result: no dried out O-rings and the gas in the floatchambers doesn't have time to become nasty. Tank is full ofcourse. There's no need to store the bike with ethanolfree gas as long as the tank is full. As a matter of fact, gas that contains ethanol has quite a buffer to absorb condens, where with ethanolfree gas, there's a risk of having a little pool of water building on the bottom of the tank. Only when fuel with ethanol is left too long opposed to air in a half filled tank and then with variations in temperatures, the absorbed water might reach a level that the fuel will start to separate. Only then it can become a problem. Bear in mind that the stabilizer products (additives) are usually nothing but... alcohol, because it absorbs condens so well. Isn't that ironic?
