Right so. That's why I keep them wet during hibernation. Every 2 months I drain the carbs (the fuel can go right into the tank again). Then I turn the big idle adjustment screw out so that slides are as low as possible, crank the engine a couple of turns using the kickstarter, return the big idle screw to its former position. Crank again a few turns. Open the petcock to allow floatchambers to fill again. Shut off the petcock. That's it. No chance anything gets gummed up, no chance any rubbers dry out. Done so for decades. The only year I kept the carbs dry (experiment) I had to replace some main jet O-rings.