Clutch plates need change?

Here be mechanigeeks. Anything technical that is not a teething problem.
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deforj
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Clutch plates need change?

Post by deforj » Sun Aug 06, 2017 7:53 pm

Hi,

I have a 2013 990 SMT. I had problems with the clutch since I bought it about 2 months ago. Rebuilded the magura master cylinder and installed an Oberon clutch slave unit. My clutch is still weird. It grabs near the end of the lever travel (and unable to fix the problem with the lever ajustment). Also the clutch makes "chatter" noises when i pull the lever. The overal clutch feeling is weird. I just took two clutch plates off the bike (see the attached picture). Do my plates need replacement ? Seems like there is not that mutch meat left on them...
20626183_10154992360406902_2340708905688651505_o.jpg

deforj
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Re: Clutch plates need change?

Post by deforj » Sun Aug 06, 2017 7:55 pm

edit: Clutch problems (before fitting oberon slave) included mild gearbox grinding feel when changing gears (especially under hard acceleration) and occasional false neutrals.

bogie52
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Re: Clutch plates need change?

Post by bogie52 » Sun Aug 06, 2017 8:47 pm

you dont mention the mileage, my '05 adv needed new plates at about 8000 miles. the issue was they slipped , no weird chatter or anything.. KTM gives a stack thickness to check with a caliper, the amount mine had lost was minimal but at the low limit they gave. I went to a Barnett set and also Barnett springs, the clutch works fine, and the bike has twice the miles since.

I also own a 990 SMT, it has only 12k and the original clutch is fine, but when it fails, I will get Barnett plates.

Back in the day, Barnett clutches sometimes had the reputation of being grabby or harsh, I have no such feeling so far, the springs might be a bit heavier though.

deforj
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Re: Clutch plates need change?

Post by deforj » Sun Aug 06, 2017 8:50 pm

Thanks for the answer mate.
If it needs change i will go Barnett too. The bike has 20 000Kms so far.

deforj
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Re: Clutch plates need change?

Post by deforj » Sun Aug 06, 2017 9:40 pm

Reading a bit on the web i think I have to say the previous owner installed aftermarket chinese brake and clutch levers on the bike. It seems that some people are having issues with those. Could the pivot hole on the lever be misplaced and so the clutch travel be wrong ? Any recommendations on witch levers to use?

deforj
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Re: Clutch plates need change?

Post by deforj » Mon Aug 07, 2017 9:52 pm

For those who may want to know:

Another problem was the first gear was hard to shift in from second when coming to a stop. I took the clutch apart and the plates thinkness were way within specs. Taking the plates off I noticed near the bottom plates I had a chunk of 4-5 clutch plates and friction plates stuck together. I took them apart and cleaned them with a dry rag. Just took the bike for a ride and the clutch is now PERFECT. Smooth easy shifts and shifting down to first gear is now perfectly fine.

Magic Wand
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Re: Clutch plates need change?

Post by Magic Wand » Tue Aug 08, 2017 6:35 pm

Aha, good to know!
I wonder what made the plates and frictions plates "got stocked together"... Overheat? Bad oil?

My SMt 2010 has today 50000 km and never had a problem with the clutch.

/M

deforj
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Re: Clutch plates need change?

Post by deforj » Tue Aug 08, 2017 11:59 pm

"Got stock together" hahaha.
Sorry for my bad english. I meant they "stuck" together.
Frankly I wonder why too. I've had the bike for about two months only. Who knows what the previous owner did. The bike is super clean and rides like a charm, I think he still took good care of it overall. Anyways, the problem is solved now and i will do an oil change soon. Hope it is going to be a very reliable bike because I intend to keep it for a very long time. This bike never fails to amaze me.

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