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Old 03-31-2014, 05:29 PM   #1
urchindog OP
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Question GS 1200 w servo brakes question

Hi All,

I'm considering a 2005 GS1200 ... low mileage ... a little less than 20k.

Specifically what can you tell me about the servo brakes ...

What should I look for and what is the PM for these ? brake fluid, clean micro switches .... are they pron to component replacement over time / mileage ?

anyone chime in with real life experiance with these please. Rest of the bike looks great ... but i've read / heard different views on the brake system.

tks / cheers

B.
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Old 03-31-2014, 05:56 PM   #2
* SHAG *
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Bought my 2005 new. No brake issues except the 05's front brakes squeak coming to a stop that there was a service advisory for. I did not have the washers installed by the dealer to stop the squeak. I wear earplugs
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Old 03-31-2014, 07:11 PM   #3
JR356
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70K plus miles on my 05,no brake issues.
Did at home full system bleed last summer and full pads,no issues.

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Old 04-01-2014, 05:35 AM   #4
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134k on my 05 GS, fluid should be flushed every two years. Good write up in the hall of wisdom. They're a little more complicated to bleed. You will need a mityvac, and need to build a funnel for the servo unit, but well within the capabilities of your average wrench.

I've had a couple minor glitches over the years, but overall they still work fine.
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Old 04-01-2014, 06:00 AM   #5
Bikerboy108
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Buy the funnel from Beemer boneyard cheap. And actually easier to flush since you are using the servo motor... Told by numerous cert. bmw mechanics... NEVER use a vacuum bleeder on servo system... I don't know what mighty vac is?
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Old 04-01-2014, 06:12 AM   #6
Ed
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There is a ton of debate on this issue. I have 84K on my 05 GS. Flush the system once a year. Only issues have been with the micro switches, I've replaced them both. YMMV. My bike is in no way a highway queen. She gets dirty.

Pic is from the Two Guys Doing Stupid Things on Big Bikes tour of 2013.
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Old 04-01-2014, 12:44 PM   #7
urchindog OP
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servo brke input

tks all ,

sounds like the usual ... do the pm maint. and chances are you are good to go.

didnt hear any ghost / horror stories about them.

mucho tks for the replies,

B.
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Old 04-01-2014, 12:51 PM   #8
PhaseShifter
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2006 bike with +75K without a problem
The only thing that needs renewal after a few year, are the micro-switches in the brake-lever and the clutch-lever. (costs a few dollar) The one in the brake lever makes the ABS system faulty at ignition-on / start-up, or "makes the squirl singing" or, if you prefer, the sound of "your whining mother in law" while you're not braking at all.
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Old 04-01-2014, 04:57 PM   #9
JimVonBaden
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Quote:
Originally Posted by eric2 View Post
134k on my 05 GS, fluid should be flushed every two years. Good write up in the hall of wisdom. They're a little more complicated to bleed. You will need a mityvac, and need to build a funnel for the servo unit, but well within the capabilities of your average wrench.

I've had a couple minor glitches over the years, but overall they still work fine.
Easy enough to service, and they have proven more reliable than subsequent ABS systems overall. The only drawback is that IF they fail you have significantly reduced braking without a lot more pressure on the lever.

I have had three R1200 bikes with servo-ABS and not one single issue with any of them in a combined 220K miles.
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