My concern is if the fuel will evaporate from the bowl in the carb leaving deposits behind. On my bike, I don't worry about it since I ride it at least once a month. On the DR650, I'll shut off the fuel and let it idle until it quits to use as much of the fuel in the bowl as possible before parking it. I haven't yet had an issue with fuel that has been sitting in the tank for several months.
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln