Will a classic motorcycle seize up if i store it without oil?
Use fuel stabilizer and drain the carb(s) when it’s going to be stored for a while. If it has a battery, take it home with you and connect it to a Battery Tender or similar charger. Draining the oil should not be a problem. The viscosity of the oil will make it cling to all parts, forming a protective coating. A bit of oil in the spark plug holes will keep the piston rings from rusting to the bore(s). When restarting it after a long break, I would refill the oil first, turn the engine over a few times to spread it around (easily done with the spark plugs removed), and then add the gas and start it up.