What's going on with my front brake?

repiV · Spanner Monkey Joined: 15 May 2007 Karma :

It's quite hard to explain, but it isn't smooth or progressive. If I, for example, hold the front brake in at a particular position it feels like it's applying and releasing to a certain extent - the bike will basically jerk to a stop.

Really odd, and annoying...no idea what's causing it though. Any advice would be appreciated.

sickpup · Old Timer Joined: 21 Apr 2004 Karma :

Sounds like you have a warped disc.

Lanny · Renault 5 Driver Joined: 23 Jul 2007 Karma :

Sounds like you`ve got a warped disc mate Sad

Had that same feeling on my GSX - The warped disc showed up on the brake tester at MOT time Crying or Very sad

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The Bloke from Stoke

Lanny · Renault 5 Driver Joined: 23 Jul 2007 Karma :

repiV · Spanner Monkey Joined: 15 May 2007 Karma :

Oh shite. That sounds expensive. Sad

It passed its MOT a few weeks ago, nothing was mentioned about that - advisory for bent handlebars and bent clutch lever.
It was dropped in a low speed slide by the previous owner, which caused the above problems.

Are there any other problems caused by a warped disc? Is it going to cost £££'s to fix?

Lanny · Renault 5 Driver Joined: 23 Jul 2007 Karma :

Depends on the bike

Plenty of pattern discs around for less than OEM

Or you could risk the second hand route (beware)
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The Bloke from Stoke

repiV · Spanner Monkey Joined: 15 May 2007 Karma :

lllN30lll · World Chat Champion Joined: 12 Jun 2005 Karma :

doesn't take 10 mins to change a disc, easily done by yourself. Thumbs Up

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Turbo R1
CRF450R

Timmeh · World Chat Champion Joined: 01 Nov 2006 Karma :

repiV · Spanner Monkey Joined: 15 May 2007 Karma :

That's good to know, thanks...guess I'll go hunt for a new disc now. Smile

lllN30lll · World Chat Champion Joined: 12 Jun 2005 Karma :

when replacing the discs if you have 2 on the front it's best to replace them both at the same time, and replace your pads as well
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Turbo R1
CRF450R

repiV · Spanner Monkey Joined: 15 May 2007 Karma :

Dalemac · World Chat Champion Joined: 15 Oct 2006 Karma :

You should get the disk lock that reminds you to take it off Very Happy

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~~YBR125~~ -> GPZ500S -> SL1000

david1959 · Derestricted Danger Joined: 06 Mar 2007 Karma :

i was just reading the the thread here and thought i ought to say somthing.

dics run very hot so be careful if use use a loctite type product
it doesnt work at raised temperatures that you will find on a disc

from memory loctite is useless above 100 deg c
discs often have a blue tinge to them indicating the temperature
around 250 deg c

david
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xs500c owner from 1978