Author Topic: Linked ABS question - module flush  (Read 359 times)

Offline Random_Rockfish

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Linked ABS question - module flush
« on: August 15, 2017, 11:52:52 am »
I picked up a nice 2014 S10 recently and needed to flush its brake fluid so last night I did it the standard way.
Flushed both front calipers from the handlebar master cylinder then did the read rear brake from the rear master cylinder.
I jumped the black and blue wires under the seat to cycle the ABS module a few times then re-flushed and re-cycled everything again.
I buttoned everything up but then thought of something this morning - Should I have also flushed the rear brake from the handlebar master cylinder to pull more fluid through the ABS module or is that not possible?
The bike did come with a shop manual but I am having difficulty finding clarification.

Offline Checkswrecks

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Re: Linked ABS question - module flush
« Reply #1 on: August 15, 2017, 01:12:02 pm »
With firing off the ABS module a few times and using new fluid, you flushed it.
Damascus, MD
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Offline Random_Rockfish

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Re: Linked ABS question - module flush
« Reply #2 on: August 15, 2017, 08:25:17 pm »
Just wanted to make sure the modulator was purged of old fluid appropriately.
I had a BMW GS with their stupid power-assisted, linked brakes.  Its modulator went tits-up after only 21,000 miles.
I made sure I flushed its fluid annually but it still did me no good.  (Also, it was a PITA procedure to do on the Beemer.)

Hoping the Yammy hangs in there for me.

Offline Checkswrecks

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Re: Linked ABS question - module flush
« Reply #3 on: August 16, 2017, 12:15:44 pm »
We've had a few members with dead ABS units. Sometimes you later hear that they do a lot of stream crossings and once the drains fill, the unit sits in muddy stream water for a while. Some we hear that they are surprised it died with MANY miles in which the ABS has never been cycled. Kinda like the car owners who just add gas and get the oil changed when they think about it or every engine overhaul, whichever comes first.
 ;)
And there've been a few unexplained, but usually on higher-mileage bikes.
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Offline OldRider

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Re: Linked ABS question - module flush
« Reply #4 on: August 16, 2017, 12:31:11 pm »
Just wanted to make sure the modulator was purged of old fluid appropriately.
I had a BMW GS with their stupid power-assisted, linked brakes.  Its modulator went tits-up after only 21,000 miles.
I made sure I flushed its fluid annually but it still did me no good.  (Also, it was a PITA procedure to do on the Beemer.)

Hoping the Yammy hangs in there for me.

I had an 05 GS and got rid of it because of the servo brakes. Mine worked fine, but I didn't trust them to not go out at the wrong time. Since then I have done away with the servo set up on a few GS's by just running the brake hose, front & rear, directly from the master cylinders to the calipers. You loose the ABS function by bypassing the pump, but you do end up with some super good standard brakes. Cost is about $60 in brake hoses.

Offline worncog

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Re: Linked ABS question - module flush
« Reply #5 on: August 16, 2017, 12:42:46 pm »
A secondary issue with the ABS unit is the enclosure filling up with water and debris. It is best to keep a close eye on the enclosure if you do any wet or sloppy off-roading. The two small drains will plug quickly and it will fill to the brim, leaving your expensive ABS module soaking.

I drilled out the small holes and added two more after finding it full after a day off Florida forest road running. It was a bit soggy out there with a multitude of water crossings.
14 Super Tenere, 06 Concours, 74 R75/6 Hack, 72 XS650, 83 XS650

Offline Random_Rockfish

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Re: Linked ABS question - module flush
« Reply #6 on: August 16, 2017, 07:49:39 pm »
I had an 05 GS and got rid of it because of the servo brakes. Mine worked fine, but I didn't trust them to not go out at the wrong time. Since then I have done away with the servo set up on a few GS's by just running the brake hose, front & rear, directly from the master cylinders to the calipers. You loose the ABS function by bypassing the pump, but you do end up with some super good standard brakes. Cost is about $60 in brake hoses.

That's exactly what I did with mine when the servo died - except I installed Spiegler lines.

The brakes were then so much better - cost a bit more - better than spending $2.5K for a modulator (that sucked anyway).
« Last Edit: August 16, 2017, 07:52:22 pm by Random_Rockfish »

Offline Thrasherg

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Re: Linked ABS question - module flush
« Reply #7 on: November 13, 2017, 09:13:20 am »
Would one of you guys, tell me where the ABS servo is located? I can probably find it, but its easier if someone gives an idea. Here in Texas we have a number of stream crossings, so I would like to check the 2 drain holes mentioned and possibly enlarge or add additional holes. Mines a 2015 so the servo might have already been sitting in its own private Jacuzzi for 2 years!!  ::025::

Gary

Offline holligl

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Re: Linked ABS question - module flush
« Reply #8 on: November 13, 2017, 09:35:18 am »
Would one of you guys, tell me where the ABS servo is located? I can probably find it, but its easier if someone gives an idea. Here in Texas we have a number of stream crossings, so I would like to check the 2 drain holes mentioned and possibly enlarge or add additional holes. Mines a 2015 so the servo might have already been sitting in its own private Jacuzzi for 2 years!!  ::025::

Gary
Hope this helps:
https://www.partsfish.com/oemparts/a/yam/548f307cf870020854ef8b2b/electrical-3
2014 BluES

Offline EricV

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Re: Linked ABS question - module flush
« Reply #9 on: November 13, 2017, 09:56:52 am »
Would one of you guys, tell me where the ABS servo is located? I can probably find it, but its easier if someone gives an idea. Here in Texas we have a number of stream crossings, so I would like to check the 2 drain holes mentioned and possibly enlarge or add additional holes. Mines a 2015 so the servo might have already been sitting in its own private Jacuzzi for 2 years!!  ::025::

Gary

Take off the seat.  There is a 'tool tray'.  Beneath that, where some traditional bikes would have the battery, is the ABS module.  In the bottom of that you should find drain holes.  The tool tray will not just lift out, it requires some fastener removal to access.
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Offline limey

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Re: Linked ABS question - module flush
« Reply #10 on: November 13, 2017, 10:51:47 am »
A secondary issue with the ABS unit is the enclosure filling up with water and debris. It is best to keep a close eye on the enclosure if you do any wet or sloppy off-roading. The two small drains will plug quickly and it will fill to the brim, leaving your expensive ABS module soaking.

I drilled out the small holes and added two more after finding it full after a day off Florida forest road running. It was a bit soggy out there with a multitude of water crossings.
I believe my 2012 was the first to have the ABS unit fail and as you say the mud and crap blocked the drain hole and the unit was sitting in water for how long I don’t know. I ended up doing as you say opened up the  drain hole and drilled an extra one.

 

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