This comes up a lot (even before covid), if you store a bike for that long you should always drain the petrol from the tank and carbs (or the carbs at the very least)
On the face of it, it could be the slow circuit in the carbs is blocked (if that is the case, its a remove, strip and clean job). How long did you let the bike run for before trying to give it some throttle?
On the face of it, it could be the slow circuit in the carbs is blocked (if that is the case, its a remove, strip and clean job). How long did you let the bike run for before trying to give it some throttle?