How to power a corded electric motor with a battery?

you would need to have to many batteries hooked up to it for the thing to work. also in my opinion the motor is to small to power the bike .

That is 2 HP. Are you positive this is DC? that would be an unusual motor. Why do you say "corded"? A motor with a line cord is an AC motor, not DC.

You would need 120 volts worth of batteries, such as 10 12v batteries in series.

Or use a lower voltage battery, such as 24 or 36 volt and use a DC-DC converter to convert that to 120 volts DC.

In view that you are going DC batteries to DC motor the connection to make it run is very simple. 10 - 12 volt batteries in a sequence will give you a hundred and twenty volts. Some thing much less will make the motor run slower than its rated RPM. Volts x Amps offers you the wattage. The amperage offers you a tough proposal of the time you will be able to operate the motor. A battery system rated at 96 amp-hours would permit your 12 amp load to run approximately 9 hours. What will get slightly more intricate is trying to control the velocity of the motor. For this you'll need a gadget to regulate the voltage rated for the load you are using. A DC pace controller can be as simple as a rheostat.