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BananaLover |
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BananaLover Borekit Bruiser
Joined: 08 May 2017 Karma :
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Posted: 17:19 - 13 Jul 2018 Post subject: Brake pads too tight after fluid change |
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Yamaha dragstar 650, 1999.
So I noticed immediately that there is a weird noise coming from front of my bike, at first I thought maybe theres a small piece of gravel stuck between brake pads or something (by the sound) but that was impossible because there was no room for it. I removed the wheel today and found it difficult to get brakes off, they were really tight, and compared to a video I saw some guy doing the same thing, after the two initial bolts it just came right off.
So seems like I fucked up, but I think the noise was there a day before I changed the fluid, but maybe it was something else. Is this how it's supposed to look like? https://imgur.com/a/MkyaYVx
It looks like scratched metal, not like sand paper when I look for replacement pads.
Does it make sense if I added too much fluid or not enough? Maybe the wrong fluid? Thsi is the stuff that I used
I've never changed brake pads or fluid, I've had the bike for one year. |
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Itchy |
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Itchy Super Spammer
Joined: 07 Apr 2005 Karma :
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Posted: 17:26 - 13 Jul 2018 Post subject: |
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Um it looks to me that you don't have any brake pad material left and you've actually been braking on the brake pad backing body. This will scratch the hell out of your brake discs.
https://imgur.com/a/MkyaYVx
Take a look at this picture:
https://images-na.ssl-images-amazon.com/images/I/31E39HUE1RL.jpg
There simply is no meat left on your pads and they're worn past their useful limit... back in the day this could happen with certain brands of brake pad where the material was either counterfeit or there were manufacturing defects.
Also your brake pistons are quite dirty.
What you need to do now is the following:
Buy new brake pads.
Possibly buy new seals (I've simply put them back in more than a few times).
Remove old pads.
Clean the brake pistons. This can be done in two ways. You can pump the pistons by pressing the brake a little so they're exposed. Then clean them up and push them back in a bit. Or you can pop the pistons by simply pressing the brake until the hydralic pressure pushes them out (watch for brake fluid splash). Then clean the entire caliper change the seals and put pistons back in with your thumbs.
Then put the brake pads in and the brake pad pins.
Then put the wheel back on and brake disc between the pads.
NOW you bleed the brakes you'll hear a creeking when it is nearly complete and the brake material (not the pad body) will sit flush with the brake disc.
If you're near Manchester I can help you do this. ____________________ Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching. |
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Rogerborg |
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Rogerborg nimbA
Joined: 26 Oct 2010 Karma :
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Posted: 19:43 - 13 Jul 2018 Post subject: |
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'kin hell, you deserve whatever Tef is typing.
Have you rekt your disc, is what I'd be wondering. Got any pictures of that? ____________________ Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike |
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WD Forte |
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WD Forte World Chat Champion
Joined: 17 Jun 2010 Karma :
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Posted: 19:58 - 13 Jul 2018 Post subject: |
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In short:
Yes you have fucked up.
You'd have been better off changing the pads before they wore down so much rather than fluid.
Now you need a new disc and pads but at least you don't need
new brake fluid eh?
Apart from giving the calipers jolly good clean
you may want to check the pistons are not rusty
Heres the narsty pic
https://i.imgur.com/9yQKzhk.jpg ____________________ bikers smell of wee |
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MarJay |
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MarJay But it's British!
Joined: 15 Sep 2003 Karma :
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Posted: 20:11 - 13 Jul 2018 Post subject: |
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Most pointless maintenance ever:
Change brake fluid but leave obviously worn down to the metal brake pads. Hey, if you gonna die, you might as well die with new brake fluid eh? ____________________ British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another. |
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chris-red |
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chris-red Have you considered a TDM?
Joined: 21 Sep 2005 Karma :
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Ste |
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Ste Not Work Safe
Joined: 01 Sep 2002 Karma :
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Posted: 20:21 - 13 Jul 2018 Post subject: |
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New bike time. |
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BananaLover |
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BananaLover Borekit Bruiser
Joined: 08 May 2017 Karma :
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Posted: 20:44 - 13 Jul 2018 Post subject: |
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Damn you guys are ruthless. I changed brake fluid because it was getting dark and I figured it's about time, no other reason. Only after realising where the noise was coming from I took off the brakes to see whats up. Because it wasn't making any noise while rolling the bike but only while riding relatively fast (with helmet) could I hear it, and it was hard to locate the source. I'm a relatively new rider, I didn't even I can tear through my brake pads like this. Fuck. Hope I can still use the brake disc, it is a bit scratched. https://imgur.com/a/kyCJyhi it alwasy had some lines on it though, not as deep however.
Thanks for the offer Itchy, that's very nice of you. I'm not near you though, I'll watch a few videos and try to do it myself. I'll roll into the shop once I'm done and ask the guys do they think I need a new disc. Thank you for the instructions. |
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chris-red |
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chris-red Have you considered a TDM?
Joined: 21 Sep 2005 Karma :
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J4mes |
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J4mes World Chat Champion
Joined: 18 Mar 2011 Karma :
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RhynoCZ |
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RhynoCZ Super Spammer
Joined: 09 Mar 2012 Karma :
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Posted: 23:00 - 13 Jul 2018 Post subject: |
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BananaLover wrote: | I changed brake fluid because it was getting dark and I figured it's about time, no other reason. |
If you really want to do things by the book, then you should change the fluid every 2 years, regardless of the milage. The change in colour, although suspicious, does not tell you a thing about the condition of the fluid, unless you were boiling it for a long period of time.
The issue with brake fluid is, that it absorbs moisture. That moisture than may corrode the insides of your brake system and also boils at 100°C, unlike the DOT 4 which boils at 8 times that or so.
Oh, and when you decide to replace the brake pads, do not just stick new pads in. Clean all the rust and crud, so the pads move freely. Also check the caliper pistons are not seized.
EDIT: Before you stuff new pads in, remove the brake fluid reservoir cap and remove some of the brake fluid if necessary. The way the fluid level works is, MAX notch = fresh rotors + pads; MIN notch = worn pads. As you changed the fluid with worn pads, and being a good mechanic you topped it to the MAX notch, you're going to have way too much fluid in the system and might even not be able to push the caliper pistons back in. Also, if you won't be able to push the pistons back in with you bare hands, then there is something wrong. It is advisable to clean the pistons before you push them back in.
BananaLover wrote: | Hope I can still use the brake disc, it is a bit scratched. https://imgur.com/a/kyCJyhi it alwasy had some lines on it though, not as deep however. |
It looks alright and the fresh pads will adapt to the surface of the rotor. You may check the thickness, but it doesn't seem too worn. The scoring however is there for life, which isn't really an issue. ____________________ '87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor
Last edited by RhynoCZ on 23:12 - 13 Jul 2018; edited 4 times in total |
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Riejufixing |
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Riejufixing World Chat Champion
Joined: 24 Jun 2018 Karma :
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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Courier265 |
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Courier265 World Chat Champion
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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
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WD Forte |
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WD Forte World Chat Champion
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Ste |
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Ste Not Work Safe
Joined: 01 Sep 2002 Karma :
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Posted: 02:11 - 14 Jul 2018 Post subject: |
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No point asking a shop as the sales guy will try to sell you a new disc.
I'd also try and sell you some braided hoses. |
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BananaLover |
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BananaLover Borekit Bruiser
Joined: 08 May 2017 Karma :
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Posted: 16:04 - 17 Jul 2018 Post subject: |
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Thanks to the guys who gave me tips not cheekey responses, with your kinds of attitude a person seeking help wouldn't dare asking.
Courier265 wrote: |
To be honest, chris-red is spot on, TAKE IT TO A SHOP.... |
Rather learn to do things myself thank you very much.
Ste wrote: | No point asking a shop as the sales guy will try to sell you a new disc. |
It's not a random shop, I know the guy a little, he's gonna give me a fair opinion.
RhynoCZ wrote: | BananaLover wrote: | I changed brake fluid because it was getting dark and I figured it's about time, no other reason. |
If you really want to do things by the book, then you should change the fluid every 2 years, regardless of the milage. |
Yeah, well as I said I've owned it for a year, don't have a clue when was the last time it was changed.
RhynoCZ wrote: | Remove some of the brake fluid if necessary. As you changed the fluid with worn pads, and you topped it to the MAX notch. |
Right, that makes sense. I did indeed fill it full, now I'll know.
Riejufixing wrote: |
Personally, I'd check the thickness of the disk before deciding what to do |
It looks as thick to me as it always has. What thickness am I looking for? Here's a different angle: https://i.imgur.com/KyOML4X.jpg
It doesn't do the justice to the scratches though, they are a bit rigid.
Nobby the Bastard wrote: |
Carry on. As a hint, you'll find that the pistons are never straight in the calliper and when you are using your waterpump pliers to push them back it helps to try different points on the piston. |
Thanks for the tip, I'm currently waiting for the brake pads to come in, and I'll follow a youtube tutorial for the whole process.
The guy in the video talked about using copper grease and some other grease for pivits, without going into detail. Is there a specific grease I need here? I have copper grease and Silkolene Pro RG2 Grease already. |
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supZ |
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supZ World Chat Champion
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Islander |
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Islander World Chat Champion
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McJamweasel |
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McJamweasel BCF Junkie
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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RhynoCZ |
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RhynoCZ Super Spammer
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Islander |
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Islander World Chat Champion
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Courier265 |
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Courier265 World Chat Champion
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Old Thread Alert!
The last post was made 5 years, 311 days ago. Instead of replying here, would creating a new thread be more useful? |
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