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08 abs

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Old Sep 9, 2007 | 08:17 PM
  #11  
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choochoo
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Default RE: 08 abs

I said I was passing on basic info from dealer which wasn't much help.
Early auto abs would get confused with different sizewheels and tires. Newer ecms corrected this. Course this was 20 some years ago and I'm sure advances have been made.
Dealer would not let me pull bags or covers to really look at the system and had no tech literature on it.
Yes wheels are listed but will they work with the abs sensors? Personally haven't read anything authoritative on that yet.
neither the tech, service mgr or salesman was very knowledgeable.
ORIGINAL: Trock

Wow what a bunch of misinformation! The ABS as others have said is both front and rear, check out Hog Pro web page they have wheels for 08's listed and in the 21 size.
 
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Old Sep 9, 2007 | 08:25 PM
  #12  
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Default RE: 08 abs

As I said before, I was only passing on what the dealer told me.
And they admitted they were not very knowledgable on the system.
they couldn't even produce any literature.
Right now my computer refuses to access hd's website and a few others.
Picked up a bug or something. Can't even get into google.
I'm trying to research more authoritative literature.

ORIGINAL: electaRICK

choochoo,,, not to start a argument here,, but infact today,
I watched the ABS video disk that came with my 08 ultra,,
It is a TWO wheel system,,, it has a sperate computer from ems,
it has sensor,and wheel sender and its on the Bearing,, (if I recall correctly)
The demo on the disk will make you want it,,, and I have tryed it my self,, AWSOME
gotta try it to make a believer out of ya.
if you feel the abs pulsing on your foot or brake hand, hold the pressure,,
it pulsates at 7 x a sec,,, lot faster than you can pump your brakes manually.
No notches,,, and how many times do you actually bleed brakes??
the throttle is silky smooth,, NO complaints there either,,
They made the 08's right,,, I know, cause I dumped the 07!
 
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Old Sep 9, 2007 | 09:00 PM
  #13  
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Shovelhead Bob
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Default RE: 08 abs

ORIGINAL: choochoo

Anyway: Looked at some 08 with ABS
Techs didn't have any sales bulletins on them and weren't much help. That is what Sales People are for. Tech are supposed to be working on bikes, not selling them.... FWIW, Sales people get better literature then the Techs get, It's finding the right person to ask, that has read and understands it well enough to assist customers that is the hard part.
But for you all, it appears to be on front wheel only. Negatory.... Ever heard of any vehicle with FWAL (Front wheel Anti-Lock)?? Single sided ABS is RWAL... And HD's is DUAL WHEEL....
And until aftermarket wheel makers can come up with some new wheels you apparently won't be changing out wheels. Wheels have NOTHING to do with it, it is in the bearings... Special bearings for ABS equipped bikes, they have Tonal Rings...
Remember how the old cable type speedometer senders were mounted to front axle.
The wheel speed sensor is mounted similarly.
So space is an issue, The sensor relies on notches in the wheel (or an adapter not sure which yet) to tell it and subsequently the ABS computer if the wheel is locking up.
Also a larger diameter wheel may throw the sensor out of sinc and give a false reading. locking when you're not or vice versa. Will have to look into that too. Bravo Sierra... Wheel size has no impact on ABS action, the SENSOR RING is transmitting data to the ABS Module, which is determining wheel speed, not if you have installed +/- sized wheels and tires.... The ECM is comparing the relationship of speed and lock-up, and adjusting pulsing pressure to equalize both wheels speed down while preventing lock-up...
Service department could not (or would not) tell me if the ABS computer was separate or or part of the main ECU. So will have to check that too. ABS Moduleis where ECM used to be on Touring models, in front of battery on VRSC models....
From what I could tell, I think you will be able to bleed brakes yourself, but it will take a special procedure most likely like it does on some autos with ABS, because of the solenoid and accumulator in system. Negatory again.... The Digital Technician II is the ONLY device that can be hooked up to assist the technician in bleeding the system... It will activate the pump and specific solenoids, all the while walking the tech through the sequence of bleeders to open and close...
Haven't yet seen a article (with pics) that shows the whole system. Haven't really looked as doesn't affect me yet. But curious minds want to know, so will look into it for personal knowledge.
 
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Old Sep 9, 2007 | 09:33 PM
  #14  
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Default RE: 08 abs

yep and two different dealers were in the dark about it.
Was not intending to give misleading info, only what the uninformed dealers stated.
I am still researching for more and better info.
FigureI will need to work on one some day.
Tech I talked to was honest that he did not have training on it yet.
Sales man wasn't quite so honest. Other than admitting they had no literature on it.
Few articles I have read seem to be boiler plated from a master article and don't give much detail or schematics or pictures etc.
I did find three pictures of the sensor assembly will post separately.
couple articles say rider retains control of brake pressure and when abs is in action will feel vibrating pulse against lever and pedal and rider should maintain steady pressure. Is this correct?
Says there is a separate abs computer under the seat.
doesn't say anything about inline solenoids, but there must be something in the brake line to regulate the pressure like in automotive abs.
Will the standard digital tech read it (abs computer) or will another tool be needed. Same with bleeding. You can manually bleed most automotive abs systems but special procedures need to be followed on some (again older systems).
one article says tone ring is embedded in wheel spacer other says bearing.
From what I did see it is a clean system hardly noticeable unless you were looking for it.
And you know somebody will ask here what that black thing is on left side of front wheel with wire going to it.
Yes most auto is either rear wheel only or all four.
But as I said dealers weren't too knowledgable and all I could see was the front sensor.
But will these new bearings fit current aftermarket wheels.
And will the abs ECM respond correctly to a larger front wheel diameter without retuning? That's what I was asking. As I said some early model abs on cars would not compensate properly for larger wheels.
And further research tonight has confirmed that the d.t. will be needed to bleed the system. as S. Bob has stated.
Bob Thanks for your input. As I stated I was relaying what dealer said and admitted to knowing.
Plus was basing some info from older automotive systems. Things keep advancing.
am posting pics of system I have found in a separate post under this thread.
[quote]ORIGINAL: Shovelhead Bob

[quote]ORIGINAL: choochoo

Anyway: Looked at some 08 with ABS
Techs didn't have any sales bulletins on them and weren't much help. That is what Sales People are for. Tech are supposed to be working on bikes, not selling them.... FWIW, Sales people get better literature then the Techs get, It's finding the right person to ask, that has read and understands it well enough to assist customers that is the hard part.
But for you all, it appears to be on front wheel only. Negatory.... Ever heard of any vehicle with FWAL (Front wheel Anti-Lock)?? Single sided ABS is RWAL... And HD's is DUAL WHEEL....
And until aftermarket wheel makers can come up with some new wheels you apparently won't be changing out wheels. Wheels have NOTHING to do with it, it is in the bearings... Special bearings for ABS equipped bikes, they have Tonal Rings...
Remember how the old cable type speedometer senders were mounted to front axle.
The wheel speed sensor is mounted similarly.
So space is an issue, The sensor relies on notches in the wheel (or an adapter not sure which yet) to tell it and subsequently the ABS computer if the wheel is locking up.
Also a larger diameter wheel may throw the sensor out of sinc and give a false reading. locking when you're not or vice versa. Will have to look into that too. [color=#ff0000]Bravo Sierra... Wheel size has no impact on ABS action, the SENSOR RING is transmitting data to the ABS Module, which is determining wheel speed, not if you have installed +/- sized wheels and tires.... The ECM is comparing th
 
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Old Sep 9, 2007 | 09:36 PM
  #15  
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Default RE: 08 abs wheel sensor pics

pics I have found of the abs wheel sensor assembly





will keep searching for full system lay out if it's available will post it
found pic of ABS unit. Appears located behind the right side cover on an ultra from the picture.


hey I'm trying



 
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Old Sep 9, 2007 | 11:01 PM
  #16  
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Default RE: 08 abs wheel sensor pics

Here's a little something "authoritative"...

[IMG]local://upfiles/36555/70300E46DF534F0797941E9D64604CC3.gif[/IMG]
 
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