Hi Bill and welcome, you do not say where you are in the world, but I would try dropping the float bowls and or just try putting in some fuel with I think the guys on here call it seafoam or something like that. then if no joy then pull the carbs off. You may also want to pull the plugs and clean them as well.
I am sure someone will churp in with other suggestions as well.. There is plenty of info on here to cover your bike so fill your boots...
