Sticky caliper

[stranger12]

Hi all,

I have just changed my brake lines to hel braided line and oil to dot4 castrop performance.

What i noticed was, my calipers seems to be sticking. Both sides are rubbing against the disc and you can not spin the disc freely for more than half or 3/4th of a turn.
I opened both calipers and cleaned the pads and the spring ( metal peice thing) but the issue is still there.

Upon further inspection it looks as if the pads are moving side to side so when rotating forward the pads move up within theirnseat and rotating backward they move down . There is about 1cm of play.

Also worth saying i changed the caliper seals just few month ago and pistons looked ok.

Can it be the pistons?

Also i noticed one right hand side , one of the pads was worn more than the other . Could it be the piston?
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SV650 Red
R6 Red

[pdg]

[stranger12]

Maybe 2-5 mm. It wasn't like that at the beginning. It is ebc sintered

Just started to notice a clicking noise when i brake and realised it is the pad moving.
Moving is fine rather the sticky bit is an issue
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SV650 Red
R6 Red

[pdg]

First it was 1cm, then it was

[stranger12]

So do pads metal bits wear over time and have a play?

Re measuring lol, sorry i gave a big figure but rethinking it it was more like 2mm maybe

Re being sticky , what do you mean ?
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SV650 Red
R6 Red

[pdg]

It's being sticky = it's not moving as it should...

If one pad is worn more than the other in an opposed piston caliper then it probably is a sticking piston (or the pad sticking on the pins/in the caliper, but that's unlikely if the pads are slopping about). With a sliding caliper it's pretty normal.

Get the pads out, operate the brake slowly and see if one piston is coming out slower or is harder to push back in.


Edit to say - yes, the pad backing plate can (and does) wear a little on the contact points with the caliper. Development of slight play isn't usually a cause for concern unless it's excessive.
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Any and all advice given should not be followed - if you have to ask it means you don't know so get a man in to do it for you.

[mentalboy]

If right hand side caliper has a noticeably low pad compared to the others then remove that caliper. (Your wheel should now rotate nicely if the other caliper is ok)
Is the R6 fitted with a fixed type caliper and 4 pots that move (two on each side of the caliper)? If so it is very likely that the piston/s on the low pad need attention but all four will need checking for ease of movement
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Make mine a Corona.

[stranger12]

Yes it is a 4pot caliper 2 on each side on each caliper

So the way to test it is , remove the caliper and press the brake pedal to see if they are all moving evenly? If not then swap those piston/s?

Pistons look on with no rust
Is it safe to ride for a while until i sorted it out?
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SV650 Red
R6 Red

[mentalboy]

[evoboy]

The way I read it, is that the pads are moving when the discs/wheel is rotated.

As they are EBC, I can only assume it is because they are EBC.

If the wheel wont spin freely then the dust seal or the oil seal grooves are full of corrosion and the calipers need stripping and cleaning properly.
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Suzuki GT250 x7------- Fazer 600------CB250RS------Aprilia Rally 70----- Bandit 600

APT Motorcycles

[stranger12]

What pad brand will you go for ?
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SV650 Red
R6 Red

[stranger12]

I think one of the discs looks warped it coupd be that , right?

Visually it looks bent but need to get a dial gauge i think to check
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SV650 Red
R6 Red

[mentalboy]

[mentalboy]

[evoboy]

[stranger12]

Ah will also need to check the fluid level as it is just on max line so it could be it can't push the pistons back because no space is left for the fluid to push up
____________________
SV650 Red
R6 Red

[stranger12]

I am going to get pair of carbon brembo next month even though mine have plenty of meat left
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SV650 Red
R6 Red