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<onlyinclude>
The [[Z-Force Motor|motor]] on 2013+ models makes a white noise sound at very slow speeds when rotated (by the wheels or shaft).
: This is also described as a "whirring sound".
: This is alluded to by the term "[[wikipedia:Cogging torque|cogging]]".
: This is normal as long as it sounds like white noise and occurs as described below.
;Video Guide
* [https://www.youtube.com/watch?v=UtKvr9d35VU Strange noise Zero DS 2017] provides a reference for comparison:
*: {{#ev:youtube|UtKvr9d35VU}}
;Related Confirming Symptoms
* The noise should ''only'' occur while the motor is rotated by external input (pushing the bike around or rotating the shaft).
* The noise should ''not'' while under power (when the motor is driving its own rotation).
* The bike should gently resist being pushed while the noise is audible.
;Causes
* The direct cause is the [[Gen2/Motor Controller|controller]] applying a white noise field to the motor at very slow speeds.
* At least one connected battery's [[Main Contactor|contactor]] ''must'' have been engaged for this to occur.
*: This can occur while keyed on, or while charging.
;Effects
* There are no detrimental effects, when the sound occurs by design.
* The purpose is for the [[Gen2/Motor Controller|controller]] to detect and maintain precise knowledge of the motor's rotor angle.
* This ensures that, if the throttle demands operation, the controller will apply the field correctly to the rotor.
* You may infer that ''at least one contactor is engaged'' to power the controller.
* If the bike is keyed on, you may infer that the motorcycle should be ready to drive.
*: (aside from the [[Kickstand Switch|kickstand]] and [[Kill_Switch|kill switch]] safety interlocks).
</onlyinclude>
[[Category:Motor Sound]]
The [[Z-Force Motor|motor]] on 2013+ models makes a white noise sound at very slow speeds when rotated (by the wheels or shaft).
: This is also described as a "whirring sound".
: This is alluded to by the term "[[wikipedia:Cogging torque|cogging]]".
: This is normal as long as it sounds like white noise and occurs as described below.
;Video Guide
* [https://www.youtube.com/watch?v=UtKvr9d35VU Strange noise Zero DS 2017] provides a reference for comparison:
*: {{#ev:youtube|UtKvr9d35VU}}
;Related Confirming Symptoms
* The noise should ''only'' occur while the motor is rotated by external input (pushing the bike around or rotating the shaft).
* The noise should ''not'' while under power (when the motor is driving its own rotation).
* The bike should gently resist being pushed while the noise is audible.
;Causes
* The direct cause is the [[Gen2/Motor Controller|controller]] applying a white noise field to the motor at very slow speeds.
* At least one connected battery's [[Main Contactor|contactor]] ''must'' have been engaged for this to occur.
*: This can occur while keyed on, or while charging.
;Effects
* There are no detrimental effects, when the sound occurs by design.
* The purpose is for the [[Gen2/Motor Controller|controller]] to detect and maintain precise knowledge of the motor's rotor angle.
* This ensures that, if the throttle demands operation, the controller will apply the field correctly to the rotor.
* You may infer that ''at least one contactor is engaged'' to power the controller.
* If the bike is keyed on, you may infer that the motorcycle should be ready to drive.
*: (aside from the [[Kickstand Switch|kickstand]] and [[Kill_Switch|kill switch]] safety interlocks).
</onlyinclude>
[[Category:Motor Sound]]