Skip to content

Ask an Expert Brake problems Technical

You are in... Forums > Ask an Expert > Technical > Brake problems

Got something to say?

Got something to say?

Go to most recent reply

LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Brake problems

I have a Z750 2004 (12k miles) that has failed its MOT. The problem was a fluctuating rolling road reading when braking.

I am stuck as to what it could be.

I have changed the disks for new ones - as recommended by a mech.

Replaced pads.

Bled the fluid.

Checked and cleaned the calipers.

I think it's still the same though. I can still feel the slightest of pulsing under heavy braking - just as it was before any work was done.

Realistically, you barely notice it. I wouldn't have known if it wasn't fot the MOT fail. Can't feel anything just coasting.

But I'm stumped as to what to do next. Any help would be much appreciated.

Thanks

Reply to this Topic  
  • Posted 2 years ago (07 October 2012 20:38)

Post a message in Technical

Fields marked with an asterisk * are required

   

Please note. You cannot submit more than 4000 characters as a message.

Upload image(s) from your computer (up to 3 images)

  1.  
  2.  
  3.  

Terms of use

Use of our community areas and forums is subject to important terms of use. By joining our community and using the features you agree to be bound by these terms. See terms of use below. 

Cancel
AdieR

Joined:

Apr 08

Posts: 3071

AdieR says:

Front brake

or back brake?
Does your bike have ABS / CBS?

My old bike had slight fluctuation on the back brake (which I knew about), passed the MoT with an advisory (both brakes did work).

Reply to this Topic
MarcusMarsh

Joined:

Aug 09

Posts: 2698

MarcusMarsh says:

Brake issues

The symptoms you have related are typical of warped discs.  I can't think of anything else that would cause a similar feeling.  Particularly as things like wheel bearings etc would have been checked as part of the MOT inspection and surely would have been pointed out to you if faulty.     

[This Reply has been modified by the Author]

Reply to this Topic
jaffa90

Joined:

Mar 09

Posts: 8603

jaffa90 says:

brakes

Welcome LinusMason,do these brake calipers float or is there 2 pistons in each caliper?

Also has the front tyre been left flat or run when flat?

Reply to this Topic
ally600

Joined:

May 09

Posts: 2558

ally600 says:

worn

head race bearings can do that:wink:

Reply to this Topic
kcmc

Joined:

Jan 08

Posts: 6576

kcmc says:

Kawasaki Z750 2004

Hi LinusMason and welcome to the site:smile

I think we need more input from Linus before being able to move on with this,otherwise Gentlemen we will all just be clutching at straws:dopeyhmmmm:don't yea think.

KCMC:tongue:

Reply to this Topic
LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Brake problems

Hi and thanks for the advice.

It is front brake. They have 2 pistons, which I have cleaned and new seals. Tthe calipers are bolted to the lower fork legs rigidly.

Reply to this Topic
LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Z750

No, there is no ABS etc.

I hadn't noticed any problem when riding. The MOT showed it up. I could then feel it slightly if I ran on a very smooth road surface - otherwise it felt like road imperfections.

What is a head race bearing?

Reply to this Topic
LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

More

Regarding the tyres. No they are new and have done <1000 miles. They look like new and haven't gone flat. Just riding, I don't get any judder at any speed.

Reply to this Topic
jaffa90

Joined:

Mar 09

Posts: 8603

jaffa90 says:

brakes

head race bearings are steering head bearings,these are also checked on the MOT.

I would spin that front wheel on the centre stand if fitted or jack the front up and check the discs, rim & tyre for run out,use a slow speed drill to turn the tyre and maybe a mate to help.

[This Reply has been modified by the Author]

Reply to this Topic
LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Z750

Thanks Jaffa90

I'll do that and come back.

 I had no advisors on the MOT so I assume the head bearings and wheel bearings were good.

 

Reply to this Topic

Page

Compare Insurance

Save money by comparing quotes. It's quick and easy

Motorcycles for sale

 

It's only £13.99 to advertise your motorcycle on MCN

Sell your Motorcycle