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kramdra |
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kramdra World Chat Champion
Joined: 28 Oct 2010 Karma :
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Posted: 22:34 - 21 Aug 2016 Post subject: Brake pad uneven wear? |
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Getting uneven wear on pads, is it normal?
More wear happens on the bottom pot/pads, which see the disc first as it rotates. Probably a result of drilled disc eating into the pad? seems to be 0.5-0.8mm difference after 30k miles
I have rotated my pads, which should even it out. The good ones have perhaps 10k miles left, but I had to swap the other two for spare. One was down to 0.3mm at the bottom (the top of this pad was just on the wear marker 1mm). MOT is soon so will get new before then. |
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RhynoCZ |
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RhynoCZ Super Spammer
Joined: 09 Mar 2012 Karma :
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Posted: 22:41 - 21 Aug 2016 Post subject: |
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Nope, not normal at all. Time to clean/rebuild the caliper. Some uneveness is possible between the left and right pad in one caliper, especially if it's a floating caliper, but when talking about only one pad, it should never have uneven wear.
EDIT: Rotating the pads to even the wear is wrong as well.
This kind of thing should never happen:
https://www.aa1car.com/library/brake_pads_uneven_wear.jpg ____________________ '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 |
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kramdra |
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kramdra World Chat Champion
Joined: 28 Oct 2010 Karma :
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Posted: 23:00 - 21 Aug 2016 Post subject: |
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It is not massively uneven, 0.5mm not 3mm. However the pads only have 3mm to begin with (including the 1mm wear limit), so that 0.5mm is quite a few wasted miles. Both pads in both callipers are the same, slightly more wear on the bottom pot. Callipers were stripped and cleaned Jan 2015, I noticed some pots were slightly freer to push by thumb back then. Seals were inspected, perfect condition, cleaned and put back. Callipers and seal groves were spotless. Today I pushed the pistons half out and flossed them clean with tissue and brake cleaner, they all seem equal, much better than they used to be.
What to do? I will fit new pads this month anyway, but seems silly to do seals just before winter. Also need new rear disk, rear pads, probably new rear piston and seals. About 90 quid. Front pads and seals is another 200 quid if I use genuine Nissin parts, which I would prefer. |
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Kickstart |
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Kickstart The Oracle
Joined: 04 Feb 2002 Karma :
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Pete. |
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Pete. Super Spammer
Joined: 22 Aug 2006 Karma :
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Posted: 23:41 - 21 Aug 2016 Post subject: |
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Normal. I don't think I've had any pad pair that wore at exactly the same rate and it's common to find a couple of mm or more extra thickness on one side, especially on the rear. In fact, I have a drawer full of old pads for when I/someone gets caught out with pads down to metal and a wait for a new set. Better to put in a part-worn pad temporarily than trash the disc. ____________________ a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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Shinigami |
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Shinigami World Chat Champion
Joined: 14 Feb 2012 Karma :
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Fizzer Thou |
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Fizzer Thou World Chat Champion
Joined: 06 Aug 2011 Karma :
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Posted: 23:52 - 23 Aug 2016 Post subject: |
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The rear pads on the Exup and the FJ12 have shims that allow different pressure on one side of the pad.It sounds like one is missing or that where the pad backing plate slides in the caliper body,that it is catching somewhere and not moving freely ____________________ Just talk bikes.What else is there?
Always have a 'Plan B' |
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MCN |
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MCN Super Spammer
Joined: 22 Jul 2015 Karma :
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kramdra |
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kramdra World Chat Champion
Joined: 28 Oct 2010 Karma :
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Fizzer Thou |
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Fizzer Thou World Chat Champion
Joined: 06 Aug 2011 Karma :
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Kickstart |
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Kickstart The Oracle
Joined: 04 Feb 2002 Karma :
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Old Thread Alert!
The last post was made 7 years, 283 days ago. Instead of replying here, would creating a new thread be more useful? |
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