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