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Deleted member 4366
Guest
It can only be an internal battery fault, so you need a replacement battery. I would say that it's something like the cell-pack is able to move inside the case, and when it does, it pulls on a wire, which compromises a connection.
Try leaning the bike right over on each side and then bump it on the road to see if gravity will reproduce the fault.
Try leaning the bike right over on each side and then bump it on the road to see if gravity will reproduce the fault.