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Old 07-07-2014, 01:46 PM   #1
vandernator OP
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Question Clutch grab 03 950s

Hi all,

I've been having a search for a while but cant find a definite answer to my problem.

I've got a 2003 950 adventure s, when pulling off from stationary the clutch is extremely jerky, as in it shakes the bike around a almost stalls the bike.

I've cleaned the oil jet which is the .30 version and topped up the fluid but my problem remains.

Im not sure weather to go with a full bleed of the clutch system, order a new oberon slave cylinder or burn my cash on a new set of plates/booster?

What do we think?

Cheers
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Old 07-07-2014, 02:12 PM   #2
Chuckracer
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I'd pop the cover off, pull the cover and plates and have a look-see before I made any decisions.
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Old 07-07-2014, 03:21 PM   #3
DirtyADV
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Maybe get clutch plates out a see.

Mileage?

Mine had worn tabs at 60 000 km maybe partly caused by the CJ tougher clutch basket that showed very little wear, rekluse could have helped cause it but it was very grabby when trying to get moving:





/Johan
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Old 07-07-2014, 03:27 PM   #4
Boatman
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Pull the plates out and switch the last steel plate with any other in the stack. There is a Bellville washer (spring washer) next to that plate that wears a slight groove in the plate. The symptom you are describing is classic for this issue.

The Bellville is #11 in the diagram...

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Old 07-07-2014, 03:48 PM   #5
vandernator OP
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thanks for the suggestions, i'll have a go of pulling the plates tomorrow if i get chance.

Mileage wise i'm on 33,000.
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Old 07-07-2014, 05:21 PM   #6
gefr
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Once in there, check the large central nut.

I am talking about #part 15 in the the upper image. It has been reported that to loosen and create some funny effects.
Cheers.
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Old 07-07-2014, 05:27 PM   #7
Swashbuckler
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Quote:
Originally Posted by Boatman View Post
Pull the plates out and switch the last steel plate with any other in the stack. There is a Bellville washer (spring washer) next to that plate that wears a slight groove in the plate. The symptom you are describing is classic for this issue.

The Bellville is #11 in the diagram...

I'm going through the same issue. I pulled the plates and they looked good to me, except for the wear on the last plate as described above. I switched plates and put it all together. It isn't as bad as it was before, but there is still drag.

Other things I've done:
Rebuilt Evoluizine clutch slave
Replaced fluid

My next option is to replace the clutch plates ($90 for the kit from outlaw racing on ebay) and the clutch push rod.
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Old 07-07-2014, 07:51 PM   #8
gearheadE30
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Check your clutch basket nut. Mine has been loose since I bought the bike and I just thought the drag was normal. After a particularly gnarly hillclimb, my clutch started doing weird things and dragging a lot more, so I think the clutch abuse was the last straw. Tightened (and loctite'd) it and now I have no clutch drag at all. Spec is 130 NM.
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Old 07-08-2014, 02:59 AM   #9
Hodgo
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I bet your clutch basket is notchy.
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Old 07-08-2014, 03:46 AM   #10
roookie1
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Easy fix, mine did the same. There is an updates clutchrod part no 30 change that. Its cheap, and it cured my problems..
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Old 07-08-2014, 09:19 AM   #11
HellsAlien
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Vander,

'03/lotsa miles >> check clutch basket fingers for wear, hub too. Renew or replace as needed.

Does it shudder mostly when cold/first time out of the driveway? If so, warm the motor a bit more if possible. Cycle the clutch 3 or 4 times in gear but without engaging any drive from the motor, helps add clearance at the plate stack. The plates get "glued" together when not riding.

You can remove the bellville spring too. It has pros/cons. I have done this to several other clutches too. The bellville is there to widen the clutch engagement zone, but it also adds a lot of drag to a worn/hot clutch. Removing the bellville will reduce hot clutch drag and make hot clutch shifting a bit better. Removal also increases shudder when cold, so take your pick.

Clutch shudder is mostly reduced by new oil. Big Ktms like new oil!

But primarily, the little marks in the clutch basket need to go away. Sorry, not a cheap part, and not real easy to stone out on the bench, but it can be done.
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Old 07-08-2014, 02:27 PM   #12
vandernator OP
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Talking



Fixed it!! Plates out and surprise surprise the last one is scored, swap it over all is fine.

No worn tabs on the friction plates, basket fingers are all in good nick no wear. All in all a very happy chap

Cheers all.
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Old 07-08-2014, 02:36 PM   #13
Chuckracer
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Helluva difference, ain't it? I just did mine, and Woah! Like a brand new clutch!
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Old 07-08-2014, 02:44 PM   #14
Boatman
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Quote:
Originally Posted by vandernator View Post


Fixed it!! Plates out and surprise surprise the last one is scored, swap it over all is fine.

No worn tabs on the friction plates, basket fingers are all in good nick no wear. All in all a very happy chap

Cheers all.
Quote:
Originally Posted by Chuckracer View Post
Helluva difference, ain't it? I just did mine, and Woah! Like a brand new clutch!


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Old 07-08-2014, 03:55 PM   #15
vandernator OP
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It's like a new bike now
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