Rear brake pedal right down "Excessive travel"

[GrinningGSer]

Hey MartinK, off topic , but seing as you have mentioned throttle body failures ; my bike suffered throttle body failure ( engine code) leaving me stranded . Replacement of the throttle body ( not cheap ) did not fix the problem or the code . Replacement of the ECU fixed my motorcycle.
i.e. wasn’t my throttle body

 

[GrinningGSer]

More often than not , excessive pedal travel is caused by air in the system . I was asked ,”has your bike been on its side?” , to which my answer was “yes!”
Also ;
Do you need to activate the ABS using GS911 , during the bleed service ? ( I do have GS911 and do use it during bleeding ).
I’ve heard, because I was told, but cannot confirm , that dealers do not routinely ‘activate the ABS’ during brake bleeds .
Brake bleeding really is ‘child’s play’, if you understand how to do it, and the results are immediate.

 

[MartinK]

I asked the technician, he said it's normally just because the rear brake hasn't been bled properly, using the correct tools a d process, he doesn't think there's an inherent issue....

 

[Robbie M]

Hey MartinK, off topic , but seing as you have mentioned throttle body failures ; my bike suffered throttle body failure ( engine code) leaving me stranded . Replacement of the throttle body ( not cheap ) did not fix the problem or the code . Replacement of the ECU fixed my motorcycle.
i.e. wasn’t my throttle body

Hi, can I ask, what put you on to replacing the ECU? I'm having throttle body problems with my R1200GS on my 3rd throttle body, and getting better. But still dropping into limp mode after a road test.

 

[theoneandonly]

read this

• Forums
• The Bikes
• BMW
• 850/1100/1150 Oilheads

sticking rear master cylinder.​

 

[theoneandonly]

Post in thread 'sticking rear master cylinder.'

Dec 5, 2021

Use your rear brake more, and harder you fanny.

the 2 of you can FRO

you know me so well .

( you don't need the rear brake , when the wheel is 1 inch off the road)

• theoneandonly

 

[GrinningGSer]

Hi, can I ask, what put you on to replacing the ECU? I'm having throttle body problems with my R1200GS on my 3rd throttle body, and getting better. But still dropping into limp mode after a road test.

It wasn’t my decision ; my aged bike is STILL on BMW extended warranty , the benefit , of which , is ‘it ain’t my problem !’ Dealer firstly replaced throttle body ( which is what fault codes were saying ). Then , after not fixing the problem , I’ll guess the mothership instructed ECU replacement . That WORKED .
No cost to me .

And relevant to this thread , my excessive pedal pressure , right down to the floor .. mothership also gave instructions , which were ‘Replace ABS pump’
That WORKED also . Repeated bleeds did not fix the issue . Again , No cost to me .

 

[Robbie M]

It wasn’t my decision ; my aged bike is STILL on BMW extended warranty , the benefit , of which , is ‘it ain’t my problem !’ Dealer firstly replaced throttle body ( which is what fault codes were saying ). Then , after not fixing the problem , I’ll guess the mothership instructed ECU replacement . That WORKED .
No cost to me .

And relevant to this thread , my excessive pedal pressure , right down to the floor .. mothership also gave instructions , which were ‘Replace ABS pump’
That WORKED also . Repeated bleeds did not fix the issue . Again , No cost to me .

Thanks for the reply.

 

[Santa-2512]

Hey MartinK, off topic , but seing as you have mentioned throttle body failures ; my bike suffered throttle body failure ( engine code) leaving me stranded . Replacement of the throttle body ( not cheap ) did not fix the problem or the code . Replacement of the ECU fixed my motorcycle.
i.e. wasn’t my throttle body

My ECU failed on my MY16 plate GS, when I got it back 6 months later, one throttle body failed 3 weeks later

 

[GrinningGSer]

These are very expensive parts , and my experience has been that fault codes were directing to the wrong part being replaced . I’m so pleased that the errors cost me nothing ( extended warranty ).