received the frront drive sprocket today. It fit on the shaft of them motor. I don't remember seeing the key though.
Yesterday I got the batteries at last. They are all fully charged. The charger won't be ready until next week.
I also have the dc-dc converter which converts 72V to 12 for motorcycle lights. Now I will be out of town for a week while my new toy sits at home. I can't wait to make that motor turn!