For a while I have had instructions from Zero engineering on how to wire the controller to have a reverse function available. I had decided to not do that because I wanted to get the system running without modifications possibly causing problems. However, since I now have time to kill waiting for batteries, I will go ahead and make the wiring mod. It will also require some reprogramming by Harlan to get the revers option working, so for my first tests of the running system I will leave the F / R switch in the forward position which will make it the same wiring as before modification.
As of now I'm planning to locate the F / R switch on the "tank", on the right side of the dash board (see photo), so that I won't accidentally switch with my hand still on the throttle. Not sure what would happen if I did that, but I don't wish to find out the hard way.
During the years that the trike was gas powered I got along without revers because the trike was easy to push backwards when in neutral. Now, with the electric motor always being connected to the wheel, it will be more difficult to push back with the added friction of spinning the motor (just like the Zero motorcycles are more resistant to pushing than a gas bike in neutral.).
Trikester