I usually drain all the fuel from my bike at the end of the riding season. I use a fuel hose to drain gas into a gas can, which in turns fills up my Volvo! Carb float bowls are removed and emptied as well. Every year or two I also remove the petcocks. A 15/16 same wrench fits the nut. In a minute they are off and I can drain the balance of fuel out. This is what I commonly find as pictured, another good reason to remove them. Bikes sit dry until riding season. Sometimes I change the oil, depends on mileage. Battery on a tender unless I plan more work during the winter, then I might just remove battery completely.
What are others doing prior to storage?