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Author Topic: Rate My Splines  (Read 5062 times)

Offline lilau3

  • ^ Motobrick Curious
  • Posts: 50
Rate My Splines
« on: March 09, 2018, 07:13:08 PM »
Hi Motobrickers,

So I dropped the final drive off today to check out the condition of the splines.

Everything seemed to be covered in a fine layer of red grease but it was probably fairly dry.

Is the red stuff BMW origonal?

How would you rate the condition of these splines?

Images attached.

Thanks in advance.
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  • Australia - Melbourne
  • 1988 BMW K100 LT, Vespa GTS300

Offline The Mighty Gryphon

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Re: Rate My Splines
« Reply #1 on: March 09, 2018, 07:22:12 PM »
Those pictures look pretty good to me.  What I look for is a nice wide flat spot at the top of the spline, on both parts.  A nice sharp corner at the edge of the flat is also nice.

As the splines wear, the flat at the top gets narrower, and the banging between the parts rounds off the edge.  You need to clean them good to get a good view of what is going on.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline lilau3

  • ^ Motobrick Curious
  • Posts: 50
Re: Rate My Splines
« Reply #2 on: March 09, 2018, 08:35:23 PM »
And here is the spline from the transmission. Is that groove normal?


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  • Australia - Melbourne
  • 1988 BMW K100 LT, Vespa GTS300

Offline Laitch

  • Faster than a speeding pullet
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Re: Rate My Splines
« Reply #3 on: March 09, 2018, 09:07:12 PM »
Quote from: lilau3 on March 09, 2018, 08:35:23 PM
And here is the spline from the transmission. Is that groove normal?
The groove is normal. A snap ring inside the driveshaft u-joint fits into that groove to hold the driveshaft to the output shaft.
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline lilau3

  • ^ Motobrick Curious
  • Posts: 50
Re: Rate My Splines
« Reply #4 on: March 09, 2018, 10:28:37 PM »
Quote from: Laitch on March 09, 2018, 09:07:12 PM
The groove is normal. A snap ring inside the driveshaft u-joint fits into that groove to hold the driveshaft to the output shaft.

Really! I didn’t remove any snap ring to pull the driveshaft off.


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  • Australia - Melbourne
  • 1988 BMW K100 LT, Vespa GTS300

Offline The Mighty Gryphon

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  • Posts: 6843
Re: Rate My Splines
« Reply #5 on: March 09, 2018, 10:31:34 PM »
The ring is inside the spline on the u-joint.  It stays in there when you pull the shaft. 

When you pulled the shaft off the transmission output spline you did feel resistance didn't you?
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline lilau3

  • ^ Motobrick Curious
  • Posts: 50
Re: Rate My Splines
« Reply #6 on: March 09, 2018, 10:43:20 PM »
Quote from: The Mighty Gryphon on March 09, 2018, 10:31:34 PM
The ring is inside the spline on the u-joint.  It stays in there when you pull the shaft. 

When you pulled the shaft off the transmission output spline you did feel resistance didn't you?

Yes I did. I levered it off.


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  • Australia - Melbourne
  • 1988 BMW K100 LT, Vespa GTS300

Offline blackie1

  • ^ Proficient Motobricker
  • Posts: 255
  • christchurch nz
Re: Rate My Splines
« Reply #7 on: March 10, 2018, 12:40:58 AM »
ooh nice splines
how many km's on the clock?
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  • christchurch, new zealand , where else would u want to live, really
  • 1991 K75RT naked 67,000kms

Offline lilau3

  • ^ Motobrick Curious
  • Posts: 50
Re: Rate My Splines
« Reply #8 on: March 10, 2018, 03:30:21 AM »
Quote from: blackie1 on March 10, 2018, 12:40:58 AM
ooh nice splines
how many km's on the clock?

65,000kms supposedly.


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  • Australia - Melbourne
  • 1988 BMW K100 LT, Vespa GTS300

Offline billday

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Re: Rate My Splines
« Reply #9 on: March 11, 2018, 10:09:17 AM »
The ones from about 10 o'clock to 2 o'clock look suspect to me, but maybe it's the lighting or residual grease.

Best way to photograph splines is looking straight down them.

http://www.motobrick.com/index.php?action=dlattach;topic=10928.0;attach=62313;image
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  • New York State, USA 10977
  • 1985 K100
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