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Crack in rear disk

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fray
Borekit Bruiser



Joined: 16 Apr 2011
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PostPosted: 19:29 - 28 May 2012    Post subject: Crack in rear disk Reply with quote

Hi guys, ive just been out in the sunshine scrutinizing my bike (2001 R6) as I do most day and have come across a crack in my rear disk. The disk is in pretty bad condition and ive had a replacement saved in my ebay watch list for a few weeks now just had other things to spend my money on. KTM forks seals decided to piss out etc..

https://www.ebay.co.uk/itm/220993970832?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_1916wt_1189

So now ive had to bite the bullet and order it along with a new set of pads. I use my bike every day to get to work and also for hooning around the lanes etc Mr. Green

So the question is would you lot trust it for a few days maybe a week untill the new parts arrive and i can get them fitted saying that ive proberly been riding like it for weeks?? Also what do you think of the replacement disk ive got lined up?

Heres the disk Sad

https://img341.imageshack.us/img341/5066/dickcrack.jpg

Cheers fray Karma
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Last edited by fray on 19:30 - 28 May 2012; edited 1 time in total
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GF-91
Brolly Dolly



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PostPosted: 19:30 - 28 May 2012    Post subject: Reply with quote

Crack in rear dick Laughing Laughing Laughing Laughing Laughing
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fray
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PostPosted: 19:31 - 28 May 2012    Post subject: Reply with quote

Hoped id edit it in time, lmao Rolling Eyes
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swiftb
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PostPosted: 19:31 - 28 May 2012    Post subject: Reply with quote

might want to check your title there fella...... Shocked

Id ride with it no question, just dont use the rear brake.
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palmer
Fiddled Kiddy



Joined: 21 Jul 2004
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PostPosted: 19:32 - 28 May 2012    Post subject: Reply with quote

Nope i saw it too... Very Happy

You'll be fine. I see cracked drilled disks all the time.
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bazza
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PostPosted: 19:33 - 28 May 2012    Post subject: Reply with quote

"Paging Dr Freud. Dr Freud to the white courtesy phone..."
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fray
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PostPosted: 19:35 - 28 May 2012    Post subject: Reply with quote

Hahaha your too quick for me Embarassed

Sorted, least I wont be stuck getting to work. Cheers bud
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Acemastr
World Chat Champion



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PostPosted: 19:41 - 28 May 2012    Post subject: Reply with quote

Depends how often you use your rear brake, I never use mine so that wouldn't bother me too much, saying that.. I'd probably never notice Very Happy
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lozzypop1
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PostPosted: 20:00 - 28 May 2012    Post subject: Reply with quote

Here's one made earlier:
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Acemastr
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PostPosted: 20:10 - 28 May 2012    Post subject: Reply with quote

bet that made a clunk
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bazza
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PostPosted: 20:21 - 28 May 2012    Post subject: Reply with quote

Behold the stopping power of Pilot Road 3s.

Shocked
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fray
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PostPosted: 20:29 - 28 May 2012    Post subject: Reply with quote

Bloody hell bet his arse went like the clappers when that happened!

Round town and at slow speed I do use my rear brake a fair bit so will have to keep reminding myself not to use it till its sorted.
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P.addy
Red Rocket



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PostPosted: 22:11 - 28 May 2012    Post subject: Reply with quote

I've ridden on worse fronts. That's not much to go by though.

Just use the rear less.
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Walloper
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PostPosted: 22:24 - 28 May 2012    Post subject: Reply with quote

What's a rear brake again?
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janner_10
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PostPosted: 23:01 - 28 May 2012    Post subject: Reply with quote

For the sake of £88 i'd just replace it - whether you use it or not - sort of thing that would bite you on the arse.
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fray
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PostPosted: 17:03 - 29 May 2012    Post subject: Reply with quote

Definatly getting replaced mate, am ordering the new disk and pads on Thursday when I get paid.

Gave it another look over this morning and found another crack in it a couple of inches further round. It's smaller than the one pictured but is worrying!
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james1988
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PostPosted: 17:13 - 29 May 2012    Post subject: Reply with quote

Forgive my ignorance but, what causes a brake to crack?

James
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fray
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PostPosted: 17:30 - 29 May 2012    Post subject: Reply with quote

Tbh mate I'm not really sure myself Neutral
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Reid
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PostPosted: 17:34 - 29 May 2012    Post subject: Reply with quote

I've ridden with a cracked rear (multiple cracks now) for a couple months now without issue. I should replace it (got the spare disc, just no time) but it hasn't impaired my riding much and has held up alright. A front I'd get sorted immediately however.

TLDR: It'll hold up fine
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blurredman
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PostPosted: 20:18 - 29 May 2012    Post subject: Reply with quote

james1988 wrote:
Forgive my ignorance but, what causes a brake to crack?

James


Too much braking. IE such a scenario

Someone coasting but using constant brake down a hill. Disc gets hot, expands, sometimes warps, sometimes cracks.

I gather.
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IanF
Two Stroke Sniffer



Joined: 29 Apr 2012
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PostPosted: 20:29 - 29 May 2012    Post subject: Reply with quote

Another option could be to drill a small hole at the end of the inboard crack to stop it propagating further. At least you would know it couldn't get worse. Plus it's one more hole for cooling. Very Happy
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Walloper
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PostPosted: 23:49 - 29 May 2012    Post subject: Reply with quote

james1988 wrote:
Forgive my ignorance but, what causes a brake to crack?

James


Too much heat.
Miss-alignment with calliper.
Accident damage.
Worn too thin.
Thermal shock.
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Polarbear
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PostPosted: 00:27 - 30 May 2012    Post subject: Reply with quote

IanF wrote:
Another option could be to drill a small hole at the end of the inboard crack to stop it propagating further. At least you would know it couldn't get worse. Plus it's one more hole for cooling. Very Happy


I wouldn't bother if he's going to get the disc changed shortly. Also while you are correct the drilling the ends should stop the crack propogating, I wouldn't be happy doing it on a brake disc. There are too many other factors involved. Anyway, the cracks have probably been there for ages and OP has only just noticed them. Mr. Green
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Walloper
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PostPosted: 04:09 - 30 May 2012    Post subject: Reply with quote

Polarbear wrote:
IanF wrote:
Another option could be to drill a small hole at the end of the inboard crack to stop it propagating further. At least you would know it couldn't get worse. Plus it's one more hole for cooling. Very Happy


I wouldn't bother if he's going to get the disc changed shortly. Also while you are correct the drilling the ends should stop the crack propogating, I wouldn't be happy doing it on a brake disc. There are too many other factors involved. Anyway, the cracks have probably been there for ages and OP has only just noticed them. Mr. Green


and.....

the crack, if you look at it, is directly through the centre of a hole.
Brake discs always crack through the holes.
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fray
Borekit Bruiser



Joined: 16 Apr 2011
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PostPosted: 17:45 - 02 Jun 2012    Post subject: Reply with quote

Well I fitted a new Brembo Serie Oro disc today along with new pads so I'm all sorted.

Don't think I'd bother drilling a disc when a new disk only cost £88 not worth it imo.

Thanks for the advise Very Happy
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