First one was sprag clutch and motor replaced without quibble. This time the problem started after latest firmware upgrade but this could be just coincidence. Walk mode started playing up with slow, intermittant and hesitant action. If I persisted wiith button press a flashing red fault would appear on mode selector and restart required. I then noticed an almost imperceptible very quick red flash on mode selector at every switch on. My LBS (Sportbike of Malemort in France) have always been very helpful but couln't get to the bottom of the issue immediately and changed speed sensor amongst lots of other checks. Bike quit last week and wouldn't switch on but showed a quick red flash on controller at every attempt. Sods law, whe the day came to take the bike to the shop it switched on but still had walk problem. The LBS has checked everything out and ordered a replacement motor, expected next week. Watch this space.