Servo Failures: DRIVERS' PERCEPTION OF SECONDARY BRAKING SYSTEMS

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>Tourer-Fahrer and other German publications are pursuing the "Die Zeit" story about alleged problems with BMW's power-assist brakes. The January OTL discusses the same issue. The Sport Touring web group has been at this as well. The question remains, "is the gain worth the trouble?"<

SOURCE: http://www.bmwra.org/otlintel.htm

There's a minor error above. The story was not in "DIE ZEIT", it was in "DIE WELT". And there are some minor errors in "TOURENFAHRER" aswell. For example it was the pump of the front circuit that failed, not the rear, as reported. There is a counterstatement expected in the next issue.

Anyway, DoT and the head of the Vehicle Safety Defects Branch at VOSA are aware of the problem of servo failure on BMW motorcycles and of concerns that under bumpy road conditions the ABS may lengthen the stopping distance.

I do know for sure that the issue of brake performance in the event of servo failure will get the attention at the right place – and I am confident that in the next years improvements will be made (according to the MIRA report). In the future for new cars, and of course for motorbikes, if there will be any motorbikes with servos in the future anymore. According to TOURENFAHRER the next brake system - coming in late 2006 - will be delivered without servos.

OH

 

[Fanum]

Ophra......with reference to your sig line;

I was banned at Advrider for beeing an asshole! VOTE!

Bearing in mind that you launched that thread by saying;

The dumbest species of riders you will ever find is a GS-rider. They really do think that their bikes are superior (too bad they completely suck!).

If you thought the german GS-rider is the dumbest prototype of BMW rider around the world, you just have to meet the US type of GS-rider. They are worse. There is significant empirical data for this evidence in G-Spot.

I vote YES.

You have some very valid points, and there are certainly questions that need answering, but it's getting boring now mate.

We've established that you can stop in similar distances without the servo in action, and I know that my first instinct if I grabbed a brake and it didn't come on properly would be to squueze that fukker as hard as I could.......

Mine's not let me down, I know no-one who owns a GS with Servo ABS whose system has done, and I've ridden both Evo and Non Evo systems and the Evo wins hands down.

I hope you do get somewhere in your quest...every little helps....., but it's a very small problem in a very big world, and even as someone potentially at risk from what you're talking about, I don't give a fekk.

Goodnight.

 

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Originally posted by Fanum We've established that you can stop in similar distances without the servo in action, and I know that my first instinct if I grabbed a brake and it didn't come on properly would be to squueze that fukker as hard as I could.......

If you ride 100 mph and your servos suck (without beeing aware of failing servos) you will be surprised and you will never stop in similar distance. The deceleration ist nearly half of the maximum deceleration with servos. The braking distance is only depending on the deceleration an speed. That's all.

Maximum deceleration of servo-assisted braking and residual braking braking is different.

According to the MIRA Report ... read it.

But indeed, the brakes of the GS1200 are improved!

It's much worse with the older bikes, especially the very early bikes. So - if you own a GS1200 you may be lucky, that the residual brakes are improved.

OH

 

[laughingBob]

Ophra......with reference to your sig line;


Mine's not let me down, I know no-one who owns a GS with Servo ABS whose system has done, and I've ridden both Evo and Non Evo systems and the Evo wins hands down.

I hope you do get somewhere in your quest...every little helps....., but it's a very small problem in a very big world, and even as someone potentially at risk from what you're talking about, I don't give a fekk.

Goodnight.

Well said

 

[laughingBob]

If you ride 100 mph and your servos suck (without beeing aware of failing servos) you will be surprised and you will never stop in similar distance. The deceleration ist nearly half of the maximum deceleration with servos. The braking distance is only depending on the deceleration an speed. That's all.

Maximum deceleration of servo-assisted braking and residual braking braking is different.

According to the MIRA Report ... read it.

But indeed, the brakes of the GS1200 are improved!

It's much worse with the older bikes, especially the very early bikes. So - if you own a GS1200 you may be lucky, that the residual brakes are improved.

OH

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OTL

Did anybody read the January OTL issue that discusses the same issue as TOURENFAHRER?

I'd like to hear a summary of the report.

OH

 

[mikeh501]

You are adding ZERO to this post by continually re-posting replies you made previously and bumping the thread in the hope of keeping it alive which is usually a no-no on internet boards.

Nobody is interested, you have said your peice and Im sure the majority of GS'ers on Adv & here have made up their own minds, one way or another.

Oh and BTW, that MIRA report you keep presenting as the 'truth' is about CARS not bikes FFS. Your credibility has gone down the pan.


Mods, can this whole thing be moved to forum rant?

 

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Originally posted by mikeh501 Nobody is interested...

You are wrong.

Just give the each authority of UK, USA and Germany a call, that deals with this case. It's no big deal to get yourself on the phone, and this might support the investigation.

Do not give misleading information and support security for all of us, please!

And you are right. The MIRA report is about cars. So, most car drivers won't stop in time in case of a brake failure. What's the implication for riders with servo bikes? Well?

OH