is there any adjustment ??
what i am thinking is adjusting so the motor only cuts out with the lever at the full brake /heavy brake position
now this would allow you to start on the brake or heavy brake to knock out the motor
None, it's a tiny micro switch, set deep in the part of the lever which doesn't move, the part that clamps around the handlebar - it acts almost the instant you touch the brake lever. I've a switch in series with it for now.