Need help on adding a throttle to an REI Co-op 1.1 bike

[gromike]

Well, power up your bike, hit the throttle, and see which way the wheel turns. If it turns backwards power down and plug the learning wires together. Power up and if the wheel turns smoothly the right way, power down and unplug the learning wires. If it doesn't turn right, repeat.
That's my experience, YMMV.