Firmware
Zero Motorcycles firmware release notes
Updated: January 29, 2025
2020-24 Cypher III
2020-24 SR/F & SR/S + 2022-24 SR + 2023-24 DSR/X + 2024 S & DS & DSR
MBB V41
- This release includes minor bug fixes and optimizations to improve overall user experience.
 
Previous releases
2020-24 Cypher III
2020-24 SR/F & SR/S + 2022-24 SR + 2023-24 DSR/X + 2024 S & DS & DSR
MBB V39, BMU V17
- Resolved a bug causing SoC to drop shortly after a completed charge event.
 - Improved range estimation algorithm when traveling downhill.
 - Fixed a logging bug around reported charger temperature
 
2020-24 Cypher III
2020-24 SR/F & SR/S + 2022-24 SR + 2023-24 DSR/X + 2024 S & DS & DSR
MBB V38, BMU V16
- Added support for new Australia variant motorcycles.
 - Resolved an issue causing false positive battery fault on startup.
 
2020-24 Cypher III
2020-24 SR/F & SR/S + 2022-24 SR + 2023-24 DSR/X + 2024 S & DS & DSR
MBB V37, BMU V15 and BMS V26
New Features:
- When the power pack gets to 0%, the motorcycle will no longer periodically wake to run system checks while keyed off. This periodic wake state will only re-enable once the motorcycle is charged.
 - Support for 3kW charger updates.
 
Bug Fixes/Improvements:
- Resolved issue causing 12v batteries to discharge when the charge cable is plugged in while the power pack is cold.
 - Improvement to kickstand state detection.
 - General maintenance changes to improve codebase.
 
2020-24 Cypher III
2020-24 SR/F & SR/S + 2022-24 SR + 2023-24 DSR/X + 2024 S & DS & DSR
2020-23 Cypher III
2020-23 SR/F & SR/S + 2022-23 SR + 2023 DSR/X
MBB V30, BMU V10 and BMS V23
- Improvements to Power Tank operations at low SoC
 - Resolved an issue with MBB state machine
 
MBB V29, BMU V10 and BMS V22
- Addresses Power Tank support for MY22+ SR/F, SR/S, SR, MY23+ DSR/X
 - Improvements to the charging profiles for MY22+ SR/F, SR/S, SR, MY23+ DSR/X
 - Resolves an issue causing an MBB to lose settings on startup
 
MBB V26/5, BMU V6/4, BMS V21
- Mitigation of fault handling while riding under certain conditions
 
MBB V25/4, BMU V6/4, BMS V21
- Improvements to hibernation functionality
 - Improvements to Long Term Storage Mode
 - Resolved issue causing Stability Control faults to falsely trigger
 
MBB V24, BMU V5, BMS V20
- Improvements to BMU temperature monitoring.
 - Improved timing for opening and closing the battery contactor.
 - Resolved issue preventing proper timeout during charging faults.
 
2017-23 CYPHER II
MBB V36/1, BMS V43/1
- Resolved issue preventing charger from topping off when expected
 
2017-22 CYPHER II
MBB V35, BMS V42
- Model year 2023 support
 - Impovements to battery hibernation functionality
 
2020-22 SR/F + 22 SR
MBB V23, BMU V4 BMS V19
- Improvements for CCM update process
 - Fixed false positive Contactor/Battery fault under certain conditions
 - Fixed false positive DC_DC_LOW fault notification
 - Fixed BMU fault at extremely low temperatures
 - Resolved ride mode errors upon app sync limiting top speed and power
 
MBB V21, BMS V19, BMU V3
- Improvements to SoC requirements for regen to activate
 - Resolved issue preventing error notifications from appearing on the dash
 - Motorcycles with older dash firmware will now show cellular connected
 - Resolved potential issue where throttle would activate on key on
 
2020-22 SR/S
MBB V23, BMU V4 BMS V19
- Improvements for CCM update process
 - Fixed false positive Contactor/Battery fault under certain conditions
 - Fixed false positive DC_DC_LOW fault notification
 - Fixed BMU fault at extremely low temperatures
 - Resolved ride mode errors upon app sync limiting top speed and power
 
MBB_V20/BMU_V2/BMS_V19
- Support for 22MY bikes and the new ZF14.4+ and ZF15.6+ batteries
 - Support for Cypher III+ features
 - Rename Street Mode to Standard for all FST bikes
 - Fix for Remote Data Connectivity when the bike is not riding or charging
 - Bug fixes for charge target functionality
 - Various bug fixes and improvements
 
2020-21 SR/F
MBB/BMS_V19
- Improvements and bugfixes for the SOC algorithm
 - Bugfixes for battery capacity calculations
 - Improvements for charge rate tapering at high charge rate and at high pack temperatures
 - Internal logging bugfixes and improvements
 - Cruise Control disables when the kickstand is down
 
MBB/BMS_V18
- Added and Enabled Long Term Storage Mode for FST bikes
 - Fixed update available notification after Bluetooth bike update
 - Reduced prevalence of 12V Heating notification
 - Bugfixes for scheduled charging
 - Dash will no longer show kickstand down symbol if the motorcycle is in motion
 - Powertank bike charging bugfixes in extreme conditions
 - Decreased time on twelve-volt battery during Bluetooth and CCM FW update
 - Fix for Mennekes charge bug surrounding cable limits
 
2020-21 SR/S
MBB/BMS_V19
- Improvements and bugfixes for the SOC algorithm
 - Bugfixes for battery capacity calculations
 - Improvements for charge rate tapering at high charge rate and at high pack temperatures
 - Internal logging bugfixes and improvements
 - Cruise Control disables when kickstand is down
 
MBB/BMS_V18
- Added and Enabled Long Term Storage Mode for FST bikes
 - Fixed update available notification after Bluetooth bike update
 - Reduced prevalence of 12V Heating notification
 - Bugfixes for scheduled charging
 - Dash will no longer show kickstand down symbol if motorcycle is in motion
 - Powertank bike charging bugfixes in extreme conditions
 - Decreased time on twelve volt battery during Bluetooth and CCM FW update
 - Fix for Mennekes charge bug surrounding cable limits
 
2020
MBB_V33/BMS_V4022MY FXE SupportVarious minor bugfixes
MBB_V32/BMS_V39
- Various minor bugfixes
 
2019
MBB_V33/BMS_V40
- 22MY FXE Support
 - Various minor bugfixes
 
MBB_V32/BMS_V39
- Various minor bugfixes
 
2018
MBB_V33/BMS_V40
- 22MY FXE Support
 - Various minor bugfixes
 
MBB_V32/BMS_V39
- Various minor bugfixes
 
2017
MBB_V33/BMS_V40
- 22MY FXE Support
 - Various minor bugfixes
 
MBB_V32/BMS_V39
- Various minor bugfixes
 
2016
BMS_V48
- Support for MY20 Battery Compatibility
 
MBB_V56
- Fix for MY15/16 Bluetooth packet handling
 
2015
BMS_V48
- Support for MY20 Battery Compatibility
 
MBB_V56
- Fix for MY15/16 Bluetooth packet handling
 
2014
BMS_V60
- Support for MY20 Battery Compatibility
 
MBB_V55
- Powertank firmware Improvements
 
For any questions/inquiries, feel free to contact the Zero Customer Support department at:
NA: +1 (888) 786-9376 ext. 2, or by email at support@zeromotorcycles.com
EU: +31 (0) 72 5112014, or by email at eu.support@zeromotorcycles.com






