Electrical background noise in the Headset

[quadmania]

I just bought the Harley Davidson Headset to be used connected with the 7 pin cord at my 2019 Tri Glide.
With the engine running there is an electrical background noise which is amplified every time I act on the front and/or rear brake.
I have changed the Headset and its cable but the background noise is still there.
Any suggestion?
Thanks!

[moose]

check for grounds frame and front end

[Hossamania]

check for grounds frame and front end

First things to check.