It all depends on the condition of the carbs when the bike begins to sit, storage conditions and how you've prepared the fuel in the tank. My bikes sat for 3 months with only having the batteries topped off once a week. I've been restoring my Ford Explorer and Dodge SS/T and haven't had time to ride. Took the bikes out yesterday and after the fuel pump had filled the carbs again, you'd never know they had been idle for this long.
All I have in with the Non-Ethanol, 93 Octane is STA-BIL. Other Stabilizers have been tested for numerous years.