The lift travel is a couple of inches max. The same is true of the rear cable.
on the rear brake, I can do a lever pull and get the rear wheel locked, It may not do that when moving, but it is better than nothing for sure. That thing just scared me with only one brake in front and then I had to redo it to mount the motor. the brake is attached to the rear of the fork not the front as is traditional, so I really wanted an emergency brake.