R1100 2003 servo??

[Notsomadmax]

Hi all... Quick question.
R1100 and servo brakes a bit new to me. front is fine you can hear the servo kick in. Rear brake useless and you can't hear the servo? Is it possible for one to work and not the other? If yes is that very likely servo kaput or possibly a switch? Brake light etc all functions as it should. Bike has been stood for sometime as part of a collection.

 

[JohnnyBoxer]

Remove the Servo ABS

Next ……!

 

[Paul Young]

The servo is going to fail sometime, but you’ll never know when, and when I does, it fails ‘dangerously’ when you’re needing it…

It’s a clever solution to a problem that didn’t exist, so BMW returned to the more normal non-servo system after about 5yrs.

Like JB said, get it out and treat yourself to a much more reliable and serviceable braking system

 

[zoltan]

Hi all... Quick question.
R1100 and servo brakes a bit new to me. front is fine you can hear the servo kick in. Rear brake useless and you can't hear the servo? Is it possible for one to work and not the other? If yes is that very likely servo kaput or possibly a switch? Brake light etc all functions as it should. Bike has been stood for sometime as part of a collection.

Servo on a 1100? Had it on the 1150RT in 2003.

 

[Wrigsby1]

It has to be an late R1100S and that will definitely feel better de servoed... It worked best on a big bus like the K100LT in the pissing rain but apart from that no real benefits over ABS2 and all the drawbacks of failure, especially mid ride...

 

[Notsomadmax]

It has to be an late R1100S and that will definitely feel better de servoed... It worked best on a big bus like the K100LT in the pissing rain but apart from that no real benefits over ABS2 and all the drawbacks of failure, especially mid ride...

Correct it is a 2003 Mamola Boxer cup

 

[Wrigsby1]

Correct it is a 2003 Mamola Boxer cup

A company like motor works is your friend... All the bits on the shelf to de servo and about £100 ish for the ready fit stuff... At least it is for other models...

 

[Notsomadmax]

A company like motor works is your friend... All the bits on the shelf to de servo and about £100 ish for the ready fit stuff... At least it is for other models...

Yes I have a few BMWs so I know where to go just never dealt with servo brakes before. And wanted to hear people's thoughts before I started throwing money around

 

[dxamet]

The microswitches on the brake lever (front) and on the brake pedal (rear) start the servomotor.
Since the front brake works, the microswitch of the rear brake could be defective, or the small spring sticks and does not release when the pedal is operated.

 

[Riceburner]

The microswitches on the brake lever (front) and on the brake pedal (rear) start the servomotor.
Since the front brake works, the microswitch of the rear brake could be defective, or the small spring sticks and does not release when the pedal is operated.

If I remember correctly - they also work "backwards" - IE: on the ABS bikes, the brakes micro-switches are held "shut" (ie, the electrical circuit is complete, working), when the brake levers are "at rest".

Pulling the lever "opens" the connection on the micro-switch and "breaks" the electronic circuit.

No idea why it's this way around - I assume it's for some sort of "fail-safe" reason best known to the developers at Bosch, but it's useful to know if you're tinkering with the micro-switches on the levers. If you didn't know this - they look like they're mounted illogically.

 

[Steptoe]

A company like motor works is your friend... All the bits on the shelf to de servo and about £100 ish for the ready fit stuff... At least it is for other models...

Parts needed cost about about £3 if doing it yourself ..

The microswitches on the brake lever (front) and on the brake pedal (rear) start the servomotor.
Since the front brake works, the microswitch of the rear brake could be defective, or the small spring sticks and does not release when the pedal is operated.

He says brake lights working as normal. So it’s not the switch

 

[Wrigsby1]

Parts needed cost about about £3 if doing it yourself ..


He says brake lights working as normal. So it’s not the switch

Yep, I know but I didn't have a brake pipe tool and bought the posh nylon cover for the electrics and... A new braided rear line... Might have been less but can't remember... Was easy to do though without fecking with the electrics...

 

[Posh Pete]

Just to be clear: it's an 1150 not an 1100? (Edit: Zoltan got there first though!)

 

[Notsomadmax]

Just to be clear: it's an 1150 not an 1100? (Edit: Zoltan got there first though!)

To be clear it's an 1100.

 

[Notsomadmax]

Parts needed cost about about £3 if doing it yourself ..


He says brake lights working as normal. So it’s not the switch

Hi Steptoe... Obviously you've done this before. Have you just removed servo and joined the brake pipes?

 

[Steptoe]

To be clear it's an 1100.

But specify that it’s an 1100S , not just. an 1100.
There’s a huge huge difference between the two

 

[Steptoe]

Yep, I know but I didn't have a brake pipe tool and bought the posh nylon cover for the electrics and... A new braided rear line... Might have been less but can't remember... Was easy to do though without fecking with the electrics...

You don’t have to feck with the electrics using the parts that cost £3

 

[Riceburner]

But specify that it’s an 1100S , not just. an 1100.
There’s a h
uge huge difference between the two

Am i right in thinking that the 1100S was the "longest-lived" 1100?

All the other sub-models went up to 1150, but not the S.

 

[Steptoe]

Hi Steptoe... Obviously you've done this before. Have you just removed servo and joined the brake pipes?

The write up is in the technical section, but basically, yes. .. used a 5 inch section of brass brake pipe formed into a U bend on the front brake line junction

 

[Notsomadmax]

Am i right in thinking that the 1100S was the "longest-lived" 1100?

All the other sub-models went up to 1150, but not the S.

Yes my apologies. I shouldn't assume people would just know it would be an S.

But specify that it’s an 1100S , not just. an 1100.
There’s a huge huge difference between the two

Yes my apologies, I shouldn't assume peeps would just know these things.