Worn disks

MattR

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One of the most impressive things I have found with the S10 is it’s brakes. I wasn’t expecting them to be so good when compared with my Zx14r that has PFM disks.
Yamaha have certainly used quality components there with Galfer disks and brembo master cylinders. But with the bike now approaching 20k miles it looks like the disks are rapidly wearing out. There is a pronounced lip on both the front and back disks. I’m not hard on brakes (this is the first time I’ve worn a set out) so I’m puzzled.
Is this normal at this mileage? Also, I’m minded to replace the Galfers with PFMs when the time comes (no need to worry about bobbin cleaning and the disk face can be replaced separately to the rotor if it wears out) I use SBS pads and am very happy with performance.

Any words of wisdom gratefully received

M@


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pooh and xtine

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It seems to be a fact of life now that brake pads have become much better (and harder) but the downside is that discs wear almost as much as pads. Some suggest that Brembo organics are kinder to discs, but they don't last as long.
 

gv550

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A noticeable lip at the outer edge of the discs does not mean the disc is worn out, only a thickness measurement can determine that. I’m at 190,000 kms on the original front discs, the ridge has been getting deeper over time but the measured thickness is still within spec, at the current wear rate I expect they will go to 300k. I ran with the stock original pads for 100k, and replaced them with new OEM pads that are still within spec.
Whole different story for the rear, the OEM pads last about 40k and the disc is at the wear limit around 60k. I’ve been using only OEM pads and discs, expensive but they perform very well. The linked braking system does seem to apply a lot of pressure to the rear, as I rarely actually use the rear brake pedal.
 

Cycledude

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Replaced original rear pads at 24,000 miles last week, yes the pads were completely worn out but the disc is still in excellent condition , replaced the worn out pads with another set of Yamaha OEM pads $36.
To me it kinda sounds like maybe the aftermarket SBS pads your using are causing your disks to wear much faster than normal.
 

~TABASCO~

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The front stock rotors and pads wear like IRON. Make sure to use stock pads on the front with the use of the stock rotors, if not "it could" wear the front rotors out much quicker.
The stock rear disc and pads wear quickly and are changed often. I have moved over to the Galfer rear disc and pads. They feel great but the pads are wearing just as fast (or faster) that the stock pads. I will probably try a different combo next time. I use to have a whole stack of rear disc that I have changed out in the past. I took them all to the recycler the last trip. Ive never needed to change anyones front disc, even on really high mile bikes. On all three disc, make sure the pads are wearing evenly from side to side. If they are not this needs to be addressed and not just blown off.....
 

WJBertrand

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At 80,000 miles I don't detect a lip on either of the front rotors. I did however have to replace the rear rotor at about 75,000 miles (or a bit less). It had a pronounced lip to the point that the caliper could not be slid off unless the pads were pushed back in slightly. The thickness was well below the minimum service thickness of 4.5 mm.New.jpgOld.jpg
 

StefanOnHisS10

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At 80,000 miles I don't detect a lip on either of the front rotors. I did however have to replace the rear rotor at about 75,000 miles (or a bit less). It had a pronounced lip to the point that the caliper could not be slid off unless the pads were pushed back in slightly. The thickness was well below the minimum service thickness of 4.5 mm.View attachment 82967View attachment 82968
Great tool, I love too see people using quality tools. You’ve got a lathe at home?
 

Longdog Cymru

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+1. About the only time I use the rear is when riding slow, and making bar lock turns.
And every time you use the front brakes as the rear is coupled to it. If you don’t touch the front, then the rear functions independently.

As a matter of interest, I checked my stock front pads a week ago and I noticed that they are HH rated pads, so I guess when I change I will use EBC HH pads as I have used these pads for many years on different bikes and I see no reason to change.
 

Sierra1

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And every time you use the front brakes as the rear is coupled to it. If you don’t touch the front, then the rear functions independently. . . .
The independent rear function is one of the favorite things about her. Not a fan of linked brakes for slow riding. Yes, I understand about the rear activating with the front. It's just that the Tenere is the only bike that I've ridden that needs no additional rear pedal when the front is activated.
 

jbrown

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The rear pads on my 2012 wore very quickly. So quickly that I hadn't even thought about checking them when at about 10k miles, one pad wore through and the metal to metal contact messed up the disc. A replacement OEM disc and pads are at around 30k with hardly any wear. I almost never use the rear brake, and I haven't changed how I ride. I think the rear brake piston was sticking from the factory, and pushing it back when I changed the disc and pads freed it up.
 

MattR

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And every time you use the front brakes as the rear is coupled to it. If you don’t touch the front, then the rear functions independently.

As a matter of interest, I checked my stock front pads a week ago and I noticed that they are HH rated pads, so I guess when I change I will use EBC HH pads as I have used these pads for many years on different bikes and I see no reason to change.
I used to use EBC pads but not any more. They are actually budget pads with some very clever marketing. A few of us on the Zx14r forum have found they warp disks. The EBC pads expand as they heat up meaning you have to back off pressure on the lever halfway through braking. I now use SBS pads on both bikes as you can keep a consistent pressure throughout braking with them.


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Sierra1

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Y'all jumped my s**t when I said that I won't use EBC. :oops: I wasn't even talking bad about them. I just didn't like how they were working/stopping when compared to OE. IIRC that was the first time that my riding experience/knowledge was questioned. :rolleyes:
 

Boris

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And every time you use the front brakes as the rear is coupled to it. If you don’t touch the front, then the rear functions independently.

As a matter of interest, I checked my stock front pads a week ago and I noticed that they are HH rated pads, so I guess when I change I will use EBC HH pads as I have used these pads for many years on different bikes and I see no reason to change.
I’ve run EBC HH pads on the front of my Super Tenere since 2018 and around 22k miles, without any issues whatsoever. No warped discs, no noticeable wear on the discs, no overheating. I have however suffered improved feel at the lever and improved overall braking performance.
Am currently on my 2nd set of EBC fronts.
 

WJBertrand

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I'm usually an OEM guy when it comes to brake bits, due to some scary experience with aftermarket pads on other bikes. I did however use a set of EBC rear pads on my Tenere when the OEMs were out of stock at the local dealer. I didn't notice much difference in performance, maybe a little bit better initial bite, but they sure wore out more quickly than the OEMs.
 
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