24V DC scooter motor
DC-DC battery charger
A car battery, or something similar
Wires for electrical connections and various bike parts and tools.
A multimeter might be useful to check various voltage differentials between different objects.
The specific hardware we used:
Motor: 24V 300W Scooter Motor
Battery: 12V 18 amp-hr lead-acid battery model 7448k51
Charger: Thunder 620 battery charger- 300 Watt 20 Amp
Inverter: 400 Watt inverter Model 6987k22
Step 1: Bike Stand
Buy a stand: These stands are especially nice for the back wheel because some of them are adjustable from side to side (right and left to the rider). This variation makes aligning the connection to the motor easier.