Thank you all. Really appreciate the ideas/advice.
Since the LBS were able to update the firmware on the battery *and* motor in the shop, using a wiring harness that connects to both the male batt cover and the female charger socket on the bike, itook @Dax and @Zimmerframe's advice and...
My 2019 Kenevo FSR Expert 6Fattie (owned from new) has failed. Any ideas from the wisdom of this crowd appreciated:
1. Handlebar remote had intermittently failed over ~6 months. Control on frame worked fine.
2. Suddenly assistance failed: powers on, can change assistance level, but delivers...