Squeeking Rear Brake

[Digitalize]

whenever i use my rear brake, it always squeeks, as a result i barely use it now. It never used to squeek before the winter, so i assumed it was just the cold, but its warming back up now, and still doing it. The bike has been serviced, so its not a worn pad.

Any ideas?

[Noxious89123]

It's probably just covered in crud.

Take the pad pins and pads out and give them a good clean up, and pump out the brake piston and give that a clean up too. Bit of silicon grease on the piston, push it back into the caliper, bit of copper grease on the back of the brake pad and on the pad pins, and put the whole lot back together, then see if it still squeaks.
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Curtmeister]

What type of brake is it?
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Bikes: 54 Reg Gilera DNA50 > V Reg Kawasaki BN125 Eliminator > P Reg Suzuki Bandit N600 > 57 Reg Suzuki Bandit 650
Cages: 58 Reg Vauxhall Corsa 1.25 CDTI

[Digitalize]

Sorry forgot to mention it's a disc brake, dunno if that affects your advice. Gonna be completely stripping down and cleaning my bike during Easter, so I'll have a look at it then.

[Kickstart]

Hi

Noxious89123 advice should cover it. Meant to be the cause of squealing is the pad vibrating on the piston, which is why copper grease on the back of the pad can stop it.

What bike is it?

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Curtmeister]

Copper grease is a wonderful invention especially for squeaky callipers
____________________
Bikes: 54 Reg Gilera DNA50 > V Reg Kawasaki BN125 Eliminator > P Reg Suzuki Bandit N600 > 57 Reg Suzuki Bandit 650
Cages: 58 Reg Vauxhall Corsa 1.25 CDTI

[Digitalize]

Its a Rieju Nkd 50, but basically an RS2 50.

As i said, i need to strip it down to clean all the winter muck out of it, and treat some of the rust, so i'll take a look then, fairly easy to do i guess?

[supZ]

[neil.]

Brake cleaner and a stiff toothbrush FTW. I also found in my own experience that lithium grease seems to lubricate better than copper grease. Maybe it's just the brand I'm using (3-in-1 aerosol), so I put lithium on the sliders and copper on the back of the pad. Just be careful not to get any grease on the braking surface.

BTW, the 'rattle stop' is called a shim, if it's what I think you're talking about (metal plate that sits behind the pad)? Or do you mean the brake springs that hold the pads in the calliper? You may or may not have shims and as far as I'm aware they are not essential but apparently help stop squealing too.
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CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[Noxious89123]

Please don't use lithium grease on anything near your brakes!

[neil.]

Thanks for that interesting info. What's more interesting is the Yam service manual itself recommends lithium grease on the slider! Would have thought any there would be far enough away from the pad not to cause a problem? I have also used it on the cam of the rear drum brake as it started to stick again shortly after using copper grease there. I didn't put any on the shoes or pivots inside the drum though, just on the shaft of the cam where it goes through the plate. The end that forces the shoes is copper greased. Hasn't caused problems for me so far.
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CBT February 2008 | A2 June 2008 | Yamaha YBR125 (written off) | Honda CBF125 (current)

[Noxious89123]

Interesting to know.

Maybe I'm just being a drama llama, but I'd still rather stick to silicone or copper grease.
____________________
'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[TUG]

Red grease or just flat F***in grease will do on the sliders, seriously...
Copper grease belongs on the back of pads, you dont put anything on the pistons unless installing them or new seals again using red rubber grease.
I find alot of bike owners seem to make things far more complex for themselves than needed.
But that will never change and i've quite happy to fix their errors.
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Haz ER-5, innit!

[Noxious89123]

I find the silicone grease around the exposed bits of the pistons stops them corroding, and also makes cleaning really easy, as a quick spray of brake cleaner and all the muck just falls away stuck to the grease.
____________________
'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi