Brake 'Chirp'

[PhilG]

Have a new model Ninja EX250 with 2700kms on her, and have a little issue with the rear brake.

Its making a 'Chirp chirp chirp' sound as i ride, and the faster i go the quicker it 'chirps'. If i touch the rear brake pedal at all the noise stops.

Any idea what could be causing it? and would copper grease on the back of the pad sort this?

[Genie]

Bike shop tomorrow morning.....they can fix it and should be covered by warranty.

[PhilG]

no time nor money to pay a bike shop. And i Prefer to do my own work. The bike is 2010 but shes been through insurance before so i dont know if warranty is void

[Kwaka14]

Does it pulse when you put your foot on the brake? - if so its possibly a warped disc that touches the pad at a particular point and sets up a vibration in the pad. I'd check the disc for run out (free spin the rear wheel and look for movement in the disc). The other possibility is it's rubbing on the caliper or pad somewhere, id be pulling the caliper and pads out and looking for a shiny point where it's been rubbing/touching.

[PhilG]

there is no 'juddering' in the pedal as i push it, i think at the weekend ill get a mate to help me spin the rear wheel and watch the disc. Thanks, then itll be time to strip her if i cant figure it out

[hayd3n]

there is no 'juddering' in the pedal as i push it, i think at the weekend ill get a mate to help me spin the rear wheel and watch the disc. Thanks, then itll be time to strip her if i cant figure it out

there may be somthing foreign in the pad itself
or uneven wear on the pad/disk

[steve_t]

Maybe some dirt or corrosion is preventing the piston from returning fully

[Spuds1234]

Shouldnt matter if the bikes been through insurance. Its still a manufacturing problem if the brake disk is warped.

If your shop says no that was caused by a prang then you go back to your insurance company and tell them they didnt fix your bike properly.

[tigertim20]

Have a new model Ninja EX250 with 2700kms on her, and have a little issue with the rear brake.

Its making a 'Chirp chirp chirp' sound as i ride, and the faster i go the quicker it 'chirps'. If i touch the rear brake pedal at all the noise stops.

Any idea what could be causing it? and would copper grease on the back of the pad sort this?

aww shit, im not having a go at you, but if you need to ask advice about this, rather than having the confidence to just pull it apart and look at it, fer chrissakes dont go anywhere near it with grease!!!!

Could be
warped disc
something (like a stone) jammed under the pad
brake pad getting very low (youd have to ride the rear damned hard to wear it in 2700km!
may need to be bled,
piston could be jammed

at 2700km it should still be under warrantly, swing by and have a chat with the dealer!!

[hayd3n]

there is no 'juddering' in the pedal as i push it, i think at the weekend ill get a mate to help me spin the rear wheel and watch the disc. Thanks, then itll be time to strip her if i cant figure it out

there may be somthing foreign in the pad itself
or uneven wear on the pad/disk