Warped Front Discs

[diver1]

Hi All,

Took my 2006 (14k miles) R1200 GS for it’s MOT the other day, it passed, however, I was given an advisory in respect to the front discs being possibly warped.
On the test Machine with ABS ‘OFF’ the brake test failed, however, passed when the ABS was on.
Has anyone else experienced a similar problem and should it be expected at this kind of milage?
Any help or advice would be much appreciated.

Best Regards,

John

 

[jontym]

Had same advisory last 2 mot's! just over 30,000miles.

 

[D6]

if it was a modern machine, it will show up warping etc, that little you wont feel it on the bike, but it looks a lot on the machine

 

[mr badger]

if it was a modern machine, it will show up warping etc, that little you wont feel it on the bike, but it looks a lot on the machine

Is that why we get advised that our discs are all knackered every service than?

 

[(RIP) Johno23]

09 GS. Felt JUDDER AT 6K. cHANGED UNDER WARRANTY. Common problem ive heard. New discs are strangely branded by Brembo, which originals were not. No probs in last 5k.

 

[Tuono1961]

08 GS. Same problem at 6k miles. Replaced under warranty.

In my case though you could feel it through the lever when braking. If you can't feel it I wouldn't worry about it as long as it stops OK

 

[diver1]

Hi All,
Thank you for all your advice.

NB. The bike brakes fine no judder or snatching and 'stops on a sixpence'

I will replace the Discs.............Just to be sure.

Best Regards,

John

 

[Tuono1961]

NB. The bike brakes fine no judder or snatching and 'stops on a sixpence'

I will replace the Discs.............Just to be sure.



John

If you're doing the disc's you'll also need to replace the pads.

Sounds a great deal of time and expense for no gain when every things fine. After all it was only a note by the tester. If your brakes were shot it would have been a fail

 

[diver1]

Thanks Tuone1961.

Yes, I had already planned to replace the Pads at the same time, and you are correct, it does seem strange to change the Discs/Pads when all (at present) seems to be working OK.
I think I might talke the bike to a different test station to double check the braking.

Best Regards,

John

 

[D6]

Is that why we get advised that our discs are all knackered every service than?

probably, if you cant feel any juddering but can see it on the test machine,


plus the fact VOSA tells you off if you dont do enough advisorys

 

[Mark I H]

disc

Had mine replaced at 8k. BM say the disc can be out by as much as 0.9mm before they will change them. 0.9 + 0.9 = 1.8mm on both disc together not good.

 

[BBB61]

If you can't feel the judder through the brake lever and it didn't fail the MOT, why bother changing the discs? Why not keep on riding it until the next MOT and see what happens then?

 

[JohnnyBoxer]

Had mine replaced at 8k. BM say the disc can be out by as much as 0.9mm before they will change them. 0.9 + 0.9 = 1.8mm on both disc together not good.

Think you've got your decimal points in the wrong place, you should have stated 0.09mm

0.15mm and above is an unacceptable run-out, according to the Bavarian machine, anything less than 0.15mm is ok by them