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Old 05-13-2013, 03:23 AM   #1
farcall OP
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Cry HP2 Down - Rear Disk Failure at Speed!

The 7,000km trip started off well enough.




After 400kms slab then 125kms dirt, I hit some corrugations on a gentle bend at approx 100kmh. A bit of skating but that's normal... until without warning I was spearing sideways into the bush with the back end locked up. Dunno how but I managed to stay upright, not hit anything and came to a halt in one piece. Front brake was the only one available; rear pedal plunged earthwards. Scary to say the least.
That's all brake fluid.


I'm pretty sure the back end locked up for a few moments when the disk fractured away from the mounts - hence the sideways at 100kmh stunt. The lock up quickly ceased as my new 'floating' disk freed itself and a horrible grinding noise soon filled my ears.

I was on my own. No roadside assist out here so strip her off, lay her down and get busy. I kept thinking to myself "how come you're so calm". Answered self with the logic "if there is a solution, only a clear head will find it".





Gotta admit, in the few weeks I've owned her, I never checked the disk carrier for lug fracture. Obviously I should have.

Cable tied the caliper in place and cable tied the brake pedal into a fixed position so my instinctive 'dabs' would come to nought. 45 minutes after coming to an unplanned halt, I saddled up and rode 750km home (I made a beeline for the nearest slab route).

Local BMW dealer is very concerned about what has happened. They'd never seen anything like it before and were genuine in their relief I came away unscathed. I'll update when they have a response from BMW Australia.
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Old 05-13-2013, 04:10 AM   #2
noelm
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Should change your name to Lucky

Glad to hear you are still in one piece Shane.

I will check mine when I return home.

I have read somewhere that this has occurred before and that there was a steel replacement part made - I will try and locate where I saw this.
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Old 05-13-2013, 04:28 AM   #3
noelm
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Links

http://www.advrider.com/forums/showthread.php?t=528244

http://www.advrider.com/forums/showthread.php?t=502422

http://www.advrider.com/forums/showthread.php?t=288905 Post 70 in this link mentions steel replacement - haven't read entire posts yet.

http://www.advrider.com/forums/showthread.php?t=472631
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noelm screwed with this post 05-13-2013 at 04:35 AM
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Old 05-13-2013, 04:48 AM   #4
bemiiten
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BMW knows about the problem, but corporate determined your life isn't worth the cost of a recall.
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Old 05-13-2013, 05:11 AM   #5
mike cummins
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farcall

i will check mine, thanks for the update
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Old 05-13-2013, 05:22 AM   #6
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good luck with bmw oz

I had no luck with them

cheers
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Old 05-13-2013, 06:13 AM   #7
Trekka273
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I recently purchased a 2004 R1200GS. While doing a service I noticed what I thought were cracks in the rear hub. I did some reading and saw it was an issue with the older alloy hubs. I purchased the latest steel hub and spacer from Munich Motorcycles in WA. Not cheap, but glad I did it now having seen this. One difference is that pretty much all of the cracks I could see were around the wheel stud mounts, not the rotor mounts.
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Old 05-13-2013, 06:30 AM   #8
farcall OP
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Thanks very much Noel - really appreciated. That will keep me busy for a while.
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Old 05-13-2013, 06:58 AM   #9
Spaggy
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WOW, how can that not be a recall?
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Old 05-13-2013, 07:05 AM   #10
ausfahrt
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Wow!

Glad to hear that you survived unscathed.
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Old 05-13-2013, 07:28 AM   #11
farcall OP
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Yes... would have been a very different outcome if there was a big fat tree roadside or if there was an oncoming vehicle.

BTW - I managed to complete the trip on ole faithful, the DR. Punched out 2500kms in 3 days to meet my pre-arranged get together in Alice Springs. Then a lazy 4500kms over the following 9 days . Glutton for punishment.
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Old 05-13-2013, 07:58 AM   #12
Schlug
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You gotta love these Aussies.


I'm happy you still made your trip but even happier you didn't try to mate with a tree or one of those road trains.

I've lusted after one of those HP2s for a long time. But if I ever get my hands on one I'll certainly be checking the rotor mounts.
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Old 05-13-2013, 08:26 AM   #13
Emoto
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This should be checked on all Hexhead and newer boxers at each tire change.
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Old 05-13-2013, 08:33 AM   #14
Desert Skies
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After hearing about this just after getting my 05, I checked it each tire change. Started with one crack, next tire I had two more so I promptly replaced it.
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Old 05-13-2013, 08:39 AM   #15
space
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Glad you came out OK!

Looking at the fiche, I see that there are two versions of the brake disk flange:

13 33 11 7 699 631 FLANGE1.21 1 NA
13 33 11 7 722 831 FLANGE2.01 1 $249.00

Note that the first one, weighing 1.21 lb, was discontinued and replaced by a 2.01 lb version. That's true for all 2004-2008 R1200GSs, not just the HP2.

Hmm ... I think I'll go check mine.

Also, in your last picture of the bike it looks like the front seals may be weeping. Or maybe it's just the pic.
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