Brake hum/honk while light braking?

[RipGroove]

Very crude video attached

New Galfer Pads and Magura Rotors and Deore brakes.

Both brakes work very well, lots of bite, all bedded is as they've done around 60km. The front honks (as per the video) while light braking, as soon as I heavy brake it stops. The rear is totally silent as it should be.

The front rotor has a very slight warp (even though I bought it brand new ), could that be the issue? Or could it be the back of the pads needs bedding in more against the pistons? I assume it's not that though as the rears are fine and obviously the fronts have been used a lot more during the 60km that they been on the bike.

It's very annoying while slowly cruising through town or traffic or just wherever. Obviously I'll buy a rotor trueing tool and try and straighten it but it's a two piece rotor so not sure how effective that will be? If that doesn't work I'll swap the front and rear rotors over and see if the noise migrates to the rear. But in the meantime, any ideas? Pretty sure everything on the front end is torqued up correctly so nothing up front should be loose other than the pads.

Video

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[skizzian]

a rotor straightener should work with a 2 piece rotor - you won't be moving it far

 

[RipGroove]

a rotor straightener should work with a 2 piece rotor - you won't be moving it far

Awesome, I'll give that a go then, I just wondered because it's quite a sharp kink rather than like half the rotor being out of true so it'll be tricky to straighten I think.

 

[skizzian]

Awesome, I'll give that a go then, I just wondered because it's quite a sharp kink rather than like half the rotor being out of true so it'll be tricky to straighten I think.

hmm, well I'd try and get your money back first...

 

[RipGroove]

hmm, well I'd try and get your money back first...

I can try but obviously I've done 60 odd km's with it, no harm contacting the shop though as there's clearly no damage to it like it's been hit on anything and bent by me.

 

[skizzian]

I can try but obviously I've done 60 odd km's with it, no harm contacting the shop though as there's clearly no damage to it like it's been hit on anything and bent by me.

defo worth a try

 

[irie]

If that doesn't work I'll swap the front and rear rotors over and see if the noise migrates to the rear.

If it were me I would first swap front and rear.