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Author Topic: Clutch wear analysis  (Read 6550 times)

Offline pallum

  • ^ Proficient Motobricker
  • Posts: 192
Clutch wear analysis
« on: July 18, 2012, 06:23:36 PM »
Harder to tell in pictures than it is in person but it seems only the outer portion of the clutch disk is contacting the pressure plates. Anyone seen anything like this before? 14k miles on this disk:

Full resolution: http://i.imgur.com/4cD0M.jpg




Still battling transmission/clutch misalignment :(
http://www.motobrick.com/index.php/topic,781.msg2753.html#msg2753
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  • Federal Way, WA
1994 K75RT 45,000 miles (Apr 2020)

Rick G

  • Guest
Re: Clutch wear analysis
« Reply #1 on: July 18, 2012, 09:47:14 PM »
Sure have seen it. My K1100 had exactly that problem, the pressure and fixed plate had warped so that they were only contacting on the very outside of the clutch plate about 3/16in. I managed to find one good fixed plat in my stash but had to machine the pressure plate which was a very time consuming task and not worth doing.  My advise is just buy a new set.
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Offline pallum

  • ^ Proficient Motobricker
  • Posts: 192
Re: Clutch wear analysis
« Reply #2 on: July 18, 2012, 11:53:20 PM »
Did you get any weird symptoms from it, or did you just see it during regular maintenance?
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  • Federal Way, WA
1994 K75RT 45,000 miles (Apr 2020)

Rick G

  • Guest
Re: Clutch wear analysis
« Reply #3 on: July 19, 2012, 12:42:43 AM »
The clutch was slipping real bad but only after I renewed the plate and of course it didnt match the others, the old one had worn to fit.
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Offline pallum

  • ^ Proficient Motobricker
  • Posts: 192
Re: Clutch wear analysis
« Reply #4 on: July 19, 2012, 12:52:26 AM »
Never got any any slipping issues myself but warped pressure plates were part of my misalignment theory so they're already on order. Should be pulling the intermediate housing again tonight or tomorrow to check out the alignment dowels so we'll see where to go from there.
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  • Federal Way, WA
1994 K75RT 45,000 miles (Apr 2020)

Offline Fifth Horseman

  • Curious
  • Posts: 5
Re: Clutch wear analysis
« Reply #5 on: July 19, 2012, 03:20:48 AM »
Saw that on my K11, had slipping clutch and plate was worn below minimum at the thickest point with about 1.5mm difference in thickness between inside and outside edge.
I checked the pressure plate faces with a straight edge and the amount of taper was immediately visible - one complete clutch assembly later and all is good (with the clutch at east)
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'99 K1100

Offline pallum

  • ^ Proficient Motobricker
  • Posts: 192
Re: Clutch wear analysis
« Reply #6 on: July 22, 2012, 02:52:03 AM »
Slowly taking apart things and making inspections

Clutch pushrod:
These two marks are identical on the other side of the pushrod



This mark is only on one side


At least the splines still look good after ~3500 dry miles
EDIT: Full Res- http://i.imgur.com/KyYep.jpg


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  • Federal Way, WA
1994 K75RT 45,000 miles (Apr 2020)

Rick G

  • Guest
Re: Clutch wear analysis
« Reply #7 on: July 22, 2012, 05:46:14 AM »
A little bit of wear on the splines, near the back end but not too bad. It will go a few more rounds.
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Offline pallum

  • ^ Proficient Motobricker
  • Posts: 192
Re: Clutch wear analysis
« Reply #8 on: July 22, 2012, 08:27:10 AM »
I just wish it would go 20k miles before needing a lube instead of 10k  :dunno
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  • Federal Way, WA
1994 K75RT 45,000 miles (Apr 2020)
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