ElectricMotorcycleForum.com

I wiil gladly try to respond to your question.

1) Do you know for sure this drag was not present previously?
    This bike was gliding. I was city riding, many stops and go, over 200 km autonomy, no suspect sound, no warning signs at all.

2) Have you verified its the rear wheel and not the front?
    Once back at my garage, I lifted the rear wheel and you could feel the resistance but only after 1 turn approximately. As if the motor try to apply regen even if the the key is off. The front was free running about a week ago when I lifted the front wheel.

3) Are the tires inflated properly?
    Checked weekly the pressure and all was right last time (36 psi)

4) Is a brake dragging?
    Not at all.

5) is the belt tensioned properly?
   Was also checked with Gator app and measured 65hz average.

6) If you establish its the rear, have you tried removing the belt to see if its the motor or the wheel.
    I did not,
This is really a sudden power loss with no signs of dragging. The minute before the bike was taking speed normally and after a traffic light turning green , I smoothly twisted the throttle and may be 100m later, power was lost, error 9 (motor controler fault ) popped out on the dash. Error 31 and 34  also appeared later (Battery Module Ineligible and Battery Module Connection Retries Fault).

The bike is at the dealer and I should have some feedback next week. I will keep you posted.

Thanks again

Cruising at a lazy speed in the city, many stops and go, bike running smoothly, excellent mileage (4kw/100) range of over 200km, battery at 90% (charged at 100 % in the morning and wait until the charger stops). Wait at a traffic light, turned green, smooth acceleration and bang!! total loss of power with error code #9 displayed at the dash (motor controler error). Twist the throttle, no power at all. Had to push the bike in the next parking. Noticed strong resistance rolling the bike as if the motor bearings had partially ceased.
I still can turn on the dash and does not hear anymore the contactor clic.

I know it is hard to pinpoint the cause of this problem with this limited info, but do you think a sudden motor bearing failure would have caused the motor controler to fail and consequently this loss of power.

BTW: all firmware up to date, new dash firmware and reverse option added. 12,000 km and no problem whatsoever.

Thanks for your input.

I do have an SR/S 2020 . I just ordered the Parking mode and it is working well. As for the 10% Fast charge option, it is grey out (Extended charging range) in the Dash menu of the bike.   I am not aware of the actual charger firmware version, the dealer couldn't confirm to me if they updated the charger firmware. Does that mean that I can order the option as well?

Thanks

I am back from the dealer in Montreal area with a bike fully functionnal. Thanks to the expertise of the technical staff, he was able to restart the MBB, reset the BMS and load the latest V23 firmware. I still don't have an answer as to why the firmware upgrade I did myself turned out to be a total failure. I did myself the upgrade from V19 to V21 without any problems. Lessons learned, I will now book an appointment with my dealer for every future firmware upgrade. Furthermore, those upgrades are free of charge for the life of your bike according to a recent note from Zero.  I am not saying, don't do it yourself, but if you are at a reasonnable distance from a dealer, I think that it is the best option.

I am analyzing my options as to what reasons my bike (SR/S) got bricked following a firmware update (V23). Actually, turning the key ON-OFF does nothing. The display is frozen and no bluetooth link is possible. I can only turn Off the display by disconnecting the 12v battery, Do you think a BMS reset (board behind the front wheel) would bring the bike back to life? I can't imagine having to replace any components following a simple software update...The bike was running perfectly well before.

karl
What you described is exactly what I have. Can you tell me if the repair took a long time? Was the MBB board quickly delivered to the dealer from Zero?

Thanks

Oh BTW, the odometer has returned to 0, yes 0 km. Like a brand new bike. The display is still ON (unless I disconnect the 12v battery) and the key on-off does nothing.  Is this bike bricked?? I am totally confused.