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Question:

Motorcycle disc brake squeak?

I own a honda cbf 125, my front disc brakes weren‘t sharp and it would stop a mile away if i depress the lever,. so i read somewhere online you can use sandpaper to very gently rub the disc plate to make it sharp again.i did that and still no results, so i changed the pads, and the brakes were spot on sharp! but the problem is EXTREME SQUEAKINGlike you have to let go off the handlebars and close ur ears kinda loud! i‘ve driven over 200+km on the new pads and its still not improving. my guess is i have to change the disc plate? any suggestions greatly appreciated! thanks.

Answer:

I've got to ask! you do have the brake compound in contact with the disc and not the metal backing plate!, easy to get wrong , and an honest mistake!! as others said ( my point goes to them) copper grease! this is made specifically for brakes and is what should be used, no water disperal sprays or liquid oils should be used on ANY brake component Brakes should only be lubricated with either proprietry brake grease or brake fluid nothing else. And even then olny brake grease externally and no where near any braking surface. Brakes work on friction, lubricants reduce friction :-)
Its not your rotors making the squeak, I have had pads that were squeaky and it did not go away until I replaced them with a different brand. Like Chris said you can lubricate your callipers but do not get any on your rotors or pads.

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