Hmmm, how do you get reverse gear if you propose to have a motorbike enringed offroad buggy?

I spotted this on eBay, advertised as an “Electric Reverse Kit For Motorbike Engined Kit Car” it’s basically a starter motor with a matching CNC profile cut gear to go in the drivetrain…

So if I crop the photo and doodle on it in Paint you can see it will fit somewhere in the intermediary shaft from the motorbike engine to the…

“Rocklobster” Transfer Box – made from an SJ410 and SJ413) – to lower the low ratio to give crawling gears…