Yet another 1150 servo linked brake problem !!!

[mspenz]

There must be something in the air at the moment as there's a few of these in the forum...
I think that my rear servo motor is farked

I stopped at a junction on a hill today had my foot on the brake and heard the servo pulsing, something I hadn't noticed before. Investigated further and found that with the ignition on but engine off the front system is working perfectly but if you press and hold the rear brake the servo comes on until you apply more pressure to the peddle and then it either goes off completely (no noise or whine) or it pulses irregularly whereas the front will stay in while the lever is held.

Both brakes come on with the front lever and the ABS is working (tried on gravel just using back brake and it grabs on/off), there are no warning lights showing and they go off as they should after moving, brake light is ok and the system was flushed just over 1000 miles ago.
Battery is good (12.6v with ignition on engine off and brakes applied) and micro switches are clean and clicking when used

I've read other stuff and people have had similar problems with the rear circuit but there's always been a warning light combination at the same time and I don't have any of that?

Would it be best to get it checked on a 911 or will it just tell me what I'm already thinking??

Steptoe mentioned a while back that there's a clean method for removing a servo if required that doesn't involve cutting anything so that another unit can be re-fitted at some point, can anyone point me towards that link if possible? I have seen the Dave Hall post but Steptoe said that there is a better way

Sorry if this is all old news but I've hunted around and can't find anything else that hasn't had any warning lights showing at the same time.

Cheers,

Mike.

 

[Jamieboy]

I think this is normal. When rear brake is up to pressure the servo stops, occasionally pulsing on and then off again if you drop the pressure a little bit.

Mine's done it for 50k miles... hope it's normal.

 

[mspenz]

I think this is normal. When rear brake is up to pressure the servo stops, occasionally pulsing on and then off again if you drop the pressure a little bit.

Mine's done it for 50k miles... hope it's normal.

Your probably (hopefully) right but I've never noticed it doing that before, it's annoying when you get something in your head and then convince yourself that there's something wrong when there isn't!
Totally makes sense about the pulsing and pressure as well. The lack of warning lights should have reassured me that the system is ok but then again I have a rotten cold and sinus infection at the moment so will blame my stupidity on that



Cheers,

Mike.

 

[ahutcheon]

For 69000 miles since new my rear servo has "relaxed" when holding on a hill e.g. at traffic lights. I assume it switches to a lower power consumption, on a steep hill the bike will move a couple of cm. Disconcerting at first, but I've got used to it.

 

[Roadcaptain]

mine too

 

[stuart kerr]

My servo sometimes pulses on a steep hill, no warning lights and brakes work fine so unless anyone tells me otherwise, it must be normal? Surely a fault will trigger the warning light otherwise it must be ok


Sent from my iPhone using Tapatalk

 

[mspenz]

Thanks guys, I appreciate the replies and am suitably reassured. I've only had the bike a year and covered 10k miles but I thought that I might have noticed this before, it's also good to hear that some of these servos continue to work on higher mileage bikes as well contrary to all the negative reports of early failures.

Should the need ever arise and I have to remove the unit is there a link to the clean method of removal or is it something only known by Steptoe

Cheers,

Mike.

 

[Canuck]

Cut and paste the following into google


servoectomy servo removal r1150 site: ukgser.com

 

[mspenz]

Thanks Canuck, found the bit I was looking for, it's not the complete DaveH method but Steptoe explains it better in the BMRiders club thread (he is reply number 7).

 

[mspenz]

And this with pictures

http://jpramondon.blogspot.co.uk/2010/05/abs-removal-epilogue-hopefully.html

 

[cele0001]

Thanks guys, I appreciate the replies and am suitably reassured. I've only had the bike a year and covered 10k miles but I thought that I might have noticed this before, it's also good to hear that some of these servos continue to work on higher mileage bikes as well contrary to all the negative reports of early failures.

Should the need ever arise and I have to remove the unit is there a link to the clean method of removal or is it something only known by Steptoe

Cheers,

Mike.

Just to make sure you got it. here it is again.

http://jpramondon.blogspot.co.uk/2010/05/abs-removal-epilogue-hopefully.html