When you say "crank" are you saying that it sounds like it wants to start? If you're spraying starting fluid and it only sounds like it's going to start then...yes...it's not getting fuel.
Check your fuel petcock and make sure it's ok...there should be a lever or switch on the side of the quad or somewhere closer to the carb that has an ON, OFF, and RES setting. Make sure itis not on OFF..due to the fact that it was stored.
You may need to take the carb apart as it might have a stuckj float due to sitting around..happns. If the float is stuck down, fuel will not enter the carb bowl.