How can I put chain back on my E200 razor electric scooter?Everything is in the way.

First your going to remove the deck.
Take off the chain tensioner
Next remove the motor and put the chain around the gear
Put the motor back on the scooter with the chain on
Then take the rear wheel off and put the chain into the gear.
Put the rear wheel back on along with the chain tensioner and deck
Your done!

Note: the reason why I say you have the remove the motor and wheel is the get the chain on. So you may only have to partial remove the motor or tires to get the chain on.