Author Topic: Rear brake judder  (Read 3616 times)

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Offline SnowOwl

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Re: Rear brake judder
Reply #10 on: July 13, 2017, 01:47:30 PM
I would suspect the ABS as well if no other problem is found.  Yesterday I was running an unfamiliar route and came upon my turn suddenly.  When braking hard to make the turn the rear ABS activated.  It makes the brake pedal feel just like you described.  In a hard braking situation the bikes center of gravity shifts forward a lot and takes a lot of weight off the rear tire making it easier to lock it up.  Therefore the ABS on the rear will activate sooner than you would normally expect.
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Offline Thisll do

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Re: Rear brake judder
Reply #11 on: July 13, 2017, 04:32:11 PM
AJC500 wins the banana!
Warped disc it is, though I couldn't spot it when I felt it.
Bransons of Yeovil checked it while I waited. I'd heard they are a good shop, and I'll add my vote to that.
I think there is a tendency in all of us to imagine first that it is the inscrutable black box, usually the most expensive bit that we can't test or check ourselves, that is at fault.
An old boy years ago told me that with any electrical fault, check the earth 1st, it costs only a few minutes and its most often the answer.

Offline Irishrover

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Re: Rear brake judder
Reply #12 on: July 13, 2017, 04:55:41 PM
Don't buy a cheap after market one from Ebay, I did and it cracked in 3 places. Your Honda one will be 90. I can't understand how a bike brake disc with the same amount of metal can cost 3 times more than a pair of car brake discs.
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Offline Thisll do

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Re: Rear brake judder
Reply #13 on: July 13, 2017, 05:40:14 PM
I agree, though it irks me to spend that on a genuine disc that may or may not last.
And of course, as I was told, as its "wear & tear", its not a warranty item.

Offline Irishrover

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Re: Rear brake judder
Reply #14 on: July 13, 2017, 06:31:37 PM
*Originally Posted by Thisll do [+]
I agree, though it irks me to spend that on a genuine disc that may or may not last.
And of course, as I was told, as its "wear & tear", its not a warranty item.

There are not many after market discs out there. Only 2 I know of and one is a definite no,no. Check out my previous post on it with images.
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Offline jsonder

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Re: Rear brake judder
Reply #15 on: July 14, 2017, 05:34:52 PM
Please excuse an ugly question but it could help lots of us.  What did you do to warp the disk?
John  '14CB500XA (Daily Rider),  '09CRF230L (L'il Red Piglet), '89NX250 (sold)
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Offline catstevecam

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Re: Rear brake judder
Reply #16 on: July 14, 2017, 05:43:37 PM
*Originally Posted by jsonder [+]
Please excuse an ugly question but it could help lots of us.  What did you do to warp the disk?

Same question from me - only 15,000 miles and a warped rear disc - that sounds very premature.
Steve

Offline Mel111

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Re: Rear brake judder
Reply #17 on: July 14, 2017, 06:20:32 PM
Doesn't sound like were and tear to me.  :084:

Offline AJC500

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Re: Rear brake judder
Reply #18 on: July 14, 2017, 08:51:08 PM
I don't think brake discs are the heavy duty plates of steel they used to be - my Peugeot car needed front disks at about 20,000miles, and my Hyosung bike needed a rear disk at about 10,000miles.

That's life eh?  :006:
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Offline jsonder

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Re: Rear brake judder
Reply #19 on: July 14, 2017, 09:44:20 PM
*Originally Posted by AJC500 [+]
I don't think brake discs are the heavy duty plates of steel they used to be - my Peugeot car needed front disks at about 20,000miles, and my Hyosung bike needed a rear disk at about 10,000miles. That's life eh?  :006:

I needed to replace the rear brake pads on my CRF230L at 8800 miles as well as the drive sprocket.  The rear brake on a dirt bike gets pretty hard use (unlike a street bike), but now at 13,500 miles it still has no problem.  I'm wondering if it might be Japanese versus Thai steel in the rotor?  My CRF was manufactured in Japan.
John  '14CB500XA (Daily Rider),  '09CRF230L (L'il Red Piglet), '89NX250 (sold)
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