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Old 06-08-2009, 12:37 PM   #1
Wallowa OP
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Question Paralever U-Joints: Correct Phase?

Paul Graves wrote a great article in the "BMW ON" May 2009 on "Driveshat Operation and Maintenance". In that article he went into detail of why it is critical to get the U-Joints on driveshaft "in the correct phase" to prevent damage to the joints and shaft. Especially on the GS due to the long suspension travel.

I have read the article several times but can't visualize either the correct orientation or how having the u-joints in the wrong positions will lead to stress and damage.

Can someone please post a photo showing all the U-Joints aligned correctly ['correct phase'] ?

Thanks...
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Old 06-08-2009, 01:15 PM   #2
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http://isatis.no-ip.org/K1/Joint_ent...es_decales.JPG
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Old 06-08-2009, 01:37 PM   #3
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While I haven't pulled mine apart, I think I read here that you can't get the 1200 U-joints out of phase, is this correct?
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Old 06-08-2009, 04:51 PM   #4
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Quote:
Originally Posted by SR1
While I haven't pulled mine apart, I think I read here that you can't get the 1200 U-joints out of phase, is this correct?
Depending on which splines you align on, the U-joints can be out of phase...Sev, thanks for photo but hard to see even magnified...

Does anyone out there align their u-joints as described by Paul Graves?
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Old 06-08-2009, 05:07 PM   #5
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Glad you asked the question, because after the article I was confused too. Maybe Paul will answer on the BMW board.
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Old 06-08-2009, 05:53 PM   #6
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Quote:
Originally Posted by Wallowa
Depending on which splines you align on, the U-joints can be out of phase...Sev, thanks for photo but hard to see even magnified...

Does anyone out there align their u-joints as described by Paul Graves?
Not on a Hexhead. The driveshaft is ONE piece. That is one of the hexhead advantages. The older bikes had a two piece splined driveshaft that could be assembled out of phase.
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Old 06-08-2009, 06:22 PM   #7
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Quote:
Originally Posted by marchyman
Not on a Hexhead. The driveshaft is ONE piece. That is one of the hexhead advantages. The older bikes had a two piece splined driveshaft that could be assembled out of phase.


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Old 06-08-2009, 06:58 PM   #8
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Bmw On

Sorry, relatively new to the BMW world. What is BMW ON?
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Old 06-08-2009, 07:17 PM   #9
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Originally Posted by SD455
Sorry, relatively new to the BMW world. What is BMW ON?
BMW Owner's News.

http://www.bmwmoa.org/ownersnews/

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Old 06-09-2009, 03:02 AM   #10
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Here's a picture i took of an 1150 with an indexed spline, which means it can only be phased one way. All the drive shafts from 2003 are like this, so it's impossible to set the joints out of phase.

The picture will also get rid of any confusion of what position you need the U/J joints to be in.

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Old 06-09-2009, 08:59 AM   #11
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Quote:
Originally Posted by Steptoe
The picture will also get rid of any confusion of what position you need the U/J joints to be in.
I thought both yokes were supposed to be oriented identically.

It actually looks like they are one or two splines out of phase in the picture, doesn't it? Aw jeez, am I adding to the confusion?
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Old 06-09-2009, 09:12 AM   #12
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Quote:
Originally Posted by SourKraut
I thought both yokes were supposed to be oriented identically.

It actually looks like they are one or two splines out of phase in the picture, doesn't it? Aw jeez, am I adding to the confusion?
On the older 1150 bikes there was no indexing spline, so you could get them dead on. On the R1200 the shaft is one piece, no worries.

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Old 06-09-2009, 09:17 AM   #13
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Quote:
Originally Posted by JimVonBaden
On the older 1150 bikes there was no indexing spline, so you could get them dead on. On the R1200 the shaft is one piece, no worries.

Jim
Thanks.
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Old 06-09-2009, 11:42 AM   #14
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Quote:
Originally Posted by SourKraut
I thought both yokes were supposed to be oriented identically.

It actually looks like they are one or two splines out of phase in the picture, doesn't it? Aw jeez, am I adding to the confusion?
About 5 degrees off. On the plus side, it could have been a lot worse.

If you drink, don't index.
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Old 06-09-2009, 01:48 PM   #15
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Quote:
Originally Posted by Steptoe
Here's a picture i took of an 1150 with an indexed spline, which means it can only be phased one way. All the drive shafts from 2003 are like this, so it's impossible to set the joints out of phase.

The picture will also get rid of any confusion of what position you need the U/J joints to be in.

Looks a tooth off or possibly 180 off to me too. I'd say this is what you don't want. Factory defect?
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