If you see all of the assist lights flashing on the display, and then the bike shuts down, there may be a communication problem between the controller and display.
This is almost always the result of a poor connection between the 1-4 wire harness. First check all of the connections. Then disconnect and reconnect the connectors. When the cables are disconnected, check for debris, moisture, or corrosion. You may use compressed air to clean them out as well.
In most cases this will resolve the issue. If the problem persists, the 1-4 cable may be damaged or is not functioning properly. Contact our support team and we will help you resolve the issue.