Brake binding question (again).

commandoallan

Registered user
Joined
Dec 11, 2016
Messages
158
Reaction score
0
Location
Frinton on sea
Afternoon All,

Firstly apologies for posting this as a new post, I was reading another post of the same subject and was due to ask on there but lost the location of the Q in the forum.

I have just developed an issue on my front (GSA 2008). The nearside disc has been marked around the disc presumably by defective piston sticking?? I was in the middle of nowhere so kept riding and adjusted my riding to use engine braking rather than just the rear so much (I know this is a linked braking system). I had to stop a few times and releasing the res top seemed to help a little. After reading various posts the most prevalent issue seems to be a sticking piston followed by brake hose replacement, master cylinder replacement and ABS pump/ motor.

I have previously replaced the seals and cleaned the pistons on my rear for which I completely stripped down/ took apart the rear caliper. People are stating that this approach should not be used? I have a seal kit for both calipers coming from motorworks and some brake fluid & a new set of pads.

My questions follow.

I was going to completely strip these units as I did the rear so is the best option?

My second questions is how may I tell if my discs are now warped due to my riding the bike?

My third is I have an GS911 and would need to sort out the ABS afterwards, is this easy to do or should I get a garage to finally sort the ABS reinstatement.

And my fourth, WTF is red rubber grease and where do I put it?

I plan to action this on the coming weekend so advice would indeed be very welcome as I am a novice that has only serviced, bolted shit on, stripped a brake caliper and took off my FD for Mikeyboy to recondition.

Many thanks.,
 
commandoallan said:
Afternoon All,

Firstly apologies for posting this as a new post, I was reading another post of the same subject and was due to ask on there but lost the location of the Q in the forum.

I have just developed an issue on my front (GSA 2008). The nearside disc has been marked around the disc presumably by defective piston sticking?? I was in the middle of nowhere so kept riding and adjusted my riding to use engine braking rather than just the rear so much (I know this is a linked braking system). I had to stop a few times and releasing the res top seemed to help a little. After reading various posts the most prevalent issue seems to be a sticking piston followed by brake hose replacement, master cylinder replacement and ABS pump/ motor.

I have previously replaced the seals and cleaned the pistons on my rear for which I completely stripped down/ took apart the rear caliper. People are stating that this approach should not be used? I have a seal kit for both calipers coming from motorworks and some brake fluid & a new set of pads.

My questions follow.

I was going to completely strip these units as I did the rear so is the best option?

My second questions is how may I tell if my discs are now warped due to my riding the bike?

My third is I have an GS911 and would need to sort out the ABS afterwards, is this easy to do or should I get a garage to finally sort the ABS reinstatement.

And my fourth, WTF is red rubber grease and where do I put it?

I plan to action this on the coming weekend so advice would indeed be very welcome as I am a novice that has only serviced, bolted shit on, stripped a brake caliper and took off my FD for Mikeyboy to recondition.

Many thanks.,
Click to expand...
Red grease or rubber grease comes in wee sachets or medium sized tubs and should only be used with brake seals etc.

A dti will show if the disc is warped, if you've lent you're dti guage out again, a pointer fixed to fork leg (think screwdriver or similar) set a measured distance can be used as a rough guide, as you move wheel around, chalk tyre when you come to high/low spot on disc, then adjust measurement and do again.

It does seem from gs911 info bleeding abs pump and lines is straight forward, it's a confidence thing !!! Although, I've not done it, hopefully more experienced/enlightened can give fuller advice.

Good luck.

Sent from my SM-N910F using Tapatalk
 
I’ve bled front and back brakes no problems. I just treated it like a non ABS system and all was fine.
 
Do you have the original wheels or have you added wires/alloys. The wheels mix n match. The discs do not.
 
Tractors are go said:
Red grease or rubber grease comes in wee sachets or medium sized tubs and should only be used with brake seals etc.

A dti will show if the disc is warped, if you've lent you're dti guage out again, a pointer fixed to fork leg (think screwdriver or similar) set a measured distance can be used as a rough guide, as you move wheel around, chalk tyre when you come to high/low spot on disc, then adjust measurement and do again.

It does seem from gs911 info bleeding abs pump and lines is straight forward, it's a confidence thing !!! Although, I've not done it, hopefully more experienced/enlightened can give fuller advice.

Good luck.

Sent from my SM-N910F using Tapatalk
Click to expand...

Thanks very much for the info, much appreciated.
 
Cheers Bendy, I will bleed the brakes after a full disassembly and rebuild and use the GS911. After carrying out Tag's advice I will see if one disc requires replacing, mine is a GSA with original wire wheels so sourcing from Motorworks should be straightforward.
 
commandoallan said:
Cheers Bendy, I will bleed the brakes after a full disassembly and rebuild and use the GS911. After carrying out Tag's advice I will see if one disc requires replacing, mine is a GSA with original wire wheels so sourcing from Motorworks should be straightforward.
Click to expand...
Although ebc do make well priced discs, I'd pay the extra for the Brembo oro discs, also budget for new bolts/washers too.

Ship lost for a ha'ppny of tar.

Sent from my SM-N910F using Tapatalk
 
I have an 08 GSA with 40K miles on it. I also had a sticking front caliper. When I stripped the front calipers I found the pistons were heavily corroded along the walls and causing the sticking against the seal. That said I picked out the seals and cleaned well and reassembled, with original seals using a smear of the brake lube and they have been fine since.
Given the high price of replacement pistons and seal kit I have since sourced some replacement low mile calipers to bolt on. Best of luck with your repair. I expect they are just gunged up with crud.
I havent got a GS911 but are you asking about the brake bleeding function it has? Would be interested to hear how this works also. I manually bled mine following the brake repairs (incl rear).
 
£60 per side for BMW repair kits of seals and phenolic pistons.
If your seals are damaged you really don’t have an option to replace or get another caliper.

I wonder if Brembo sell the parts. How likely is it they really are a BMW only specific size?
 
Bendy toy said:
£60 per side for BMW repair kits of seals and phenolic pistons.
If your seals are damaged you really don’t have an option to replace or get another caliper.

I wonder if Brembo sell the parts. How likely is it they really are a BMW only specific size?
Click to expand...
IIRC bmw don't do seals, but Ducati and Aprillia did list them for the Brembo calipers, could be worth checking if that's still the case.

Sent from my SM-N910F using Tapatalk
 
Tractors are go said:
IIRC bmw don't do seals, but Ducati and Aprillia did list them for the Brembo calipers, could be worth checking if that's still the case.

Sent from my SM-N910F using Tapatalk
Click to expand...

BMW do seals for the back brake. £20 the set compares with any other bike manufacturer. They also do seals for the fronts but only in sets with phenolic pistons. It’s all fine if you have laggy metal pistons but more than a bit pricey if you already have non corroded resin pistons.
 
Morning All,

Got all the kit to do a minor service and also crack on with the front brakes. Just opened the package from Motorworks and the kit is for Brembo calipers (including phenolic pistons) just checked my calipers and they are original BMW.

Motorworks have my bike details on their system so I presume these "Evo Brembo caliper repair kit various applications" will fit?

I don't want to open and find they wont fit so I cant then return them.....Any ideas anyone?

Cheers.
 
commandoallan said:
Morning All,

Got all the kit to do a minor service and also crack on with the front brakes. Just opened the package from Motorworks and the kit is for Brembo calipers (including phenolic pistons) just checked my calipers and they are original BMW.

Motorworks have my bike details on their system so I presume these "Evo Brembo caliper repair kit various applications" will fit?

I don't want to open and find they wont fit so I cant then return them.....Any ideas anyone?

Cheers.
Click to expand...
If, you gave motorworks your registration and they sent those ones, you'll be fine.

If you asked for a 2006 bike and yours is actually a 2007 then it's your problem.

It doesn't take long for a follow up phone call to allay any concerns.

Sent from my SM-N910F using Tapatalk
 
commandoallan said:
Morning All,

Got all the kit to do a minor service and also crack on with the front brakes. Just opened the package from Motorworks and the kit is for Brembo calipers (including phenolic pistons) just checked my calipers and they are original BMW.

Motorworks have my bike details on their system so I presume these "Evo Brembo caliper repair kit various applications" will fit?

I don't want to open and find they wont fit so I cant then return them.....Any ideas anyone?

Cheers.
Click to expand...

All 1200 GS front calipers are the same.
 
Many thanks all,

Minor service done and the front calipers taken apart & cleaned/ fitted with new pads. The new seal kit's were fitted with phenolic pistons but there was absolutely nothing wrong with the existing kit which is the same spec. so I have cleaned them and saved this gear for another day. Assumed from this that the issue was the build up of crap evident on the pistons.

Bled the system and then used the GS911 for the ABS. Done this routine a couple of times as the missus kept forgetting to tell me that the front res had run out of brake fluid when bleeding the air out of the front......

Front lever seems a little spongy like the rear but it stops OK so maybe requires a little time to bed in???

Anyway done now but I think I would like a couple of speed nipples for the front, assumed they were on there already but no so that along with some after market suspension will be my next job.

All in all a basic job so thanks all for the input.

Cheers :beerjug:
 
Put your bike on the side stand with the bars turned to the left (brake lever at the highest point)

Cable tie the lever in as tight as you can get it and leave it over night.

You should have a much improved lever.



Sent from a U11
 
younger06 said:
Put your bike on the side stand with the bars turned to the left (brake lever at the highest point)

Cable tie the lever in as tight as you can get it and leave it over night.

You should have a much improved lever.



Sent from a U11
Click to expand...


Done, so let's see how much of an effect it has....I'll let you know tomorrow...Is there a trick for the back?????

Thank's for that....
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
You must log in or register to reply here.

Similar threads

Teamin
R80/7 ATE front brake binding.
Replies
14
Views
921
Teamin
Teamin
Rock10
Front brake binding.
Replies
9
Views
2,080
Kenny
Kenny
Where can I buy brake caliper seals?
Replies
6
Views
213
MotoRevive
Watty100
Bleeding Brakes
2
Replies
36
Views
1,586
botus
Rear caliper carrier binding on new disc. Carrier warped?
Replies
9
Views
793
Welly


Back
Top Bottom