Here are three ways that we know to remove the motor's shaft nut:
Most electric scooter and bike motor shafts have counterclockwise threads.
Please let us know how it goes.
Yes, the chain and locking jaw pliers method will allow the nut to be sufficiently tightened. If the locking jaw pliers are on the chain tight enough it will provide a lot of shaft holding power.
Thanks for letting us know. It is great to hear that the nut was able to be removed.