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[KuRi]

Hi!

Today I have just noticed a whistle sound on my zero dsr 2020 coming from the motor. It is a high pitch noise, loud, similar to a lead synth that changes pitch with the speed.

It is noticeable between 20-50 kph and specially when coasting and deccelerating. It was not before as I know the sounds of my bike very well…

I thought it could be a wind noise but I have checked and it is directly related to motor rpm and not speed. It happens also when coasting down the road. I have not tried with the bike off yet.

It has 10.000km. Any ideas? Thanks!!!

Edited: I have just tried to switch off the bike while it is doing the noise and it goes completely away… so it is coming from the controller or the motor, probably the controller as it sounds even when not accelerating.

I thinks it is not but... could it be something similar to this? https://zeromanual.com/wiki/Motor_Whine