Should the rear disc be loose?

Do 'floating' discs not wobble/rattle then ? Is the rear disc on a 12 'floating ':nenau

That's what I thought...but on mine (2008), rear isn't floating, presumably 'cos it doesn't get as hot in typical use. Front discs float so there is a mm or so of rotational free play between "inner" and "outer" as per design.
 
Ahem.....I see your point Andres...the vidz have it. Deffo a severe case of dic wobble. Err I mean disc wobble. Hope the new disc sorts it, and you manage to warranty it OK.
 
hotter than the surface of the sun!

That's what I thought...but on mine (2008), rear isn't floating, presumably 'cos it doesn't get as hot in typical use. Front discs float so there is a mm or so of rotational free play between "inner" and "outer" as per design.

i would say my rear disc runs hotter than the fronts (linked brakes)
i fitted the 3rd set of rear pads at 12k miles,the bikes now at 16k & the fronts dont look half worn yet!
 
i would say my rear disc runs hotter than the fronts (linked brakes)
i fitted the 3rd set of rear pads at 12k miles,the bikes now at 16k & the fronts dont look half worn yet!

....it was just a guess...perhaps they are just saving a bit of money. The floating caliper on the rear is also a cheaper option...although that seems to be a lot of pads in 12k miles and may not be typical.
 
i would say my rear disc runs hotter than the fronts (linked brakes)
i fitted the 3rd set of rear pads at 12k miles,the bikes now at 16k & the fronts dont look half worn yet!

3 sets in 12K! Dear God! I've got 12.5K on the originals and still loads of meat left (and yes I do use the back brake).
 
Andres - fear not. I had a similar problem last year when in the Picos. At low speeds I heard a rattly sound like a loose exhaust or similar and traced it to my front right disc (See video). It turned out that there should be a "Wavey" washer between the allen screw and the disc to stop it rattling but allow it to float. I ordered a few from my dealer and its like new again (Gawd knows where they got to. Maybe one of the ferry workers idea of a prank but they were all missing:confused:

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/IwtSpT-w39U&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/IwtSpT-w39U&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

Save your money and buy some washers:augie

Good Luck

Andy
 
Thats where the cheap discs that you see on ebay or at autojumbles all come from :augie

I agree there is a old Derbyshire saying
"Your cheapest is alway's your dearest"
fit OEM parts always.

Big D:)
 
NA,

I agree there is a old Derbyshire saying
"Your cheapest is alway's your dearest"
fit OEM parts always.

Big D:)

I would agree with you on this point mostly,
except where the OEM parts are made of old melted down trabants,last as long as butter in a heat wave and cost 3x the price of Aftermarket.:augie
 
I would agree with you on this point mostly,
except where the OEM parts are made of old melted down trabants,last as long as butter in a heat wave and cost 3x the price of Aftermarket.:augie

Yeah, likewise, I tend to mostly go with OEM stuf but I've been using EBC discs and pads for donkey's years on all sorts of bikes and this is the first issue I have ever had.

Oh, did I mention I've had two sets of OEM front discs replaced on my GS :)

Andres
 
I agree there is a old Derbyshire saying "Your cheapest is alway's your dearest" fit OEM parts always.

And if the only difference is in the packaging? I'd guess a lot of parts go out one gold plated door marked "BM" and the others go out of a normal door marked "not BM". Just like Garmin / BM GPS's.

Same as supermarket "own" brands.

What I do wonder is what sort of help you'll get if you fit a non-oem part that causes damage to another. For example, non-oem rear disc rattles about and damages the calipers and disc carrier, will the non-oem part maker help with the cost of the other bits? And would BM if you'd used a BM marked bit?
 
STOP PRESS: Just re-torqued the disc mounting bolts to 30Nm (as per CD manual) and now have zero movement or slack.

EBC disc fitted Oct 1st last year after MOT caution, 10,000 miles on it now.

I guess I should do a bit more maintenance :hide

Hope this re-assures those with EBC discs and means you don't have to pay £144 for a BMW packaged one.

Hallelujah! ...and thank you Beetle2112 for the loan of your long Torx bit...again...

:kissy2
 
Yeah, likewise, I tend to mostly go with OEM stuf but I've been using EBC discs and pads for donkey's years on all sorts of bikes and this is the first issue I have ever had.

Oh, did I mention I've had two sets of OEM front discs replaced on my GS :)

Andres

And me!!:rob the 2 sets of discs replaced that is!
 
My new disc arrived today, is fitted and is tight as a tight thing.

Worth noting that the counterbored holes on the dodgy disc were 1 1/2 times as deep as those on the new disc!

Dodgy disc is now winging it's way to Motorworks for them to take up with EBC.

Andres
 
NITEMARE

Hiya

Spent all afternoon getting the rear disc carrier of my 05 1200,it's never been off before.

Basically it was corroded on,aluminium and steel don't like being together with a bit of water:blast.

ended up making a plate to bolt on in place of the wheel and through a combination of jacking it of with the wheel bolts and a drift through the midddle of the drive and a 8lb flogging hammer It came off:thumb2,but I had to drift it all the way.:clap

I got some pics of the plate and drift etc and will post them 2moz.
 


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