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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

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  • Posted 3 years ago (07 October 2012 20:38)

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tc330

Joined:

Mar 11

Posts: 171

tc330 says:

Front master cylinder

Had similar issues with 2005 Z750s,also changed pads, discs, calipers, wheel bearings and tyre - not together, when they wore out, it's done 117,000 miles! Finally sorted it by fitting a new master cylinder from an ER6, bolted right on too:biggrin:

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LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Brake woes

OK

Did a diy run out test. Set up a fixed edge and measured the gap at the largest point. It was about 0.7mm

Don't know if that's a lot, but didn't seem it. If it is I don't know how as they are brand new rotors.

Might try taking the rotors off, moving around and reseating them to see what happens.

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jaffa90

Joined:

Mar 09

Posts: 8997

jaffa90 says:

run out

Front wheel/tyre side to side 0.5mm max,out of round 1.00mm max.

Front discs 0.1mm max run out.

At 0.7mm wheel/tyre/disc :shock:

has this wheel had a side swipe.:unsure::unsure:  

 

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LinusMason

Joined:

Oct 12

Posts: 7

LinusMason says:

Brakes

Hasn't had anything since I've owned it at all. This is the 3rd MOT, could it be that the previous were lenient?

Could this 0.7m cause the reading on the rolling road brake test to look bad, even though I can barely feel it?

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jaffa90

Joined:

Mar 09

Posts: 8997

jaffa90 says:

brake

As Marcus first post and my third really.

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