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Grabby Shreiking Clutch when hot, how do you fix it properly?

5661 Views 33 Replies 12 Participants Last post by RobCas47, Nov 24, 2012

cb4265

Discussion Starter · Nov 20, 2012

When my clutch gets hot it will not allow proper engagement at traffic lights, it wants to grab & stall the engine & make a hideous noise.
I have read all the other threads & am not convinced that greasing the plates is the answer, I want to work out the real reason to make sense of the cure.

I have a 1098 basket with a vee two lightened clutch hub, chinese ebay SS / chrome springs & a new set of Barnett plates. This set up was perfect for 4000km's but the grabby problem developed & I have been riding around it for another 4000km's.

I have removed & replaced the plates three times after lightly sanding them & reinstalling them. Deglazing the plates helps, but the problem returns when hot.

I wonder if I am at fault with my clutch operation method or is there another answer?

I don't wan't to mask the real problem by using the lithium spray grease method unless it really is the answer.

Whatever the answer to this is belongs in the Hall of Wisdom, because there is nothing definitive there.

Thanks in advance,

Craig

1 - 20 of 34 Posts

Dennie

· #2 · Nov 20, 2012

cb4265 said:
I don't wan't to mask the real problem by using the lithium spray grease method unless it really is the answer.

You gave the answer to your problem!! Lithium is solution!!!

cb4265

Discussion Starter · #3 · Nov 20, 2012

Dennie said:
You gave the answer to your problem!! Lithium is solution!!!

Really? Why is this not common knowledge?

Thanks though

Craig

Dennie

· #4 · Nov 20, 2012

cb4265 said:
Really? Why is this not common knowledge?

Thanks though

Craig

Maybe while the real experts are at this forum

A shop cant afford to test things and lose money on customers bikes. At the forum it is different. People try things.

Just use the white lithium grease. It really works!!

stelbo

· #5 · Nov 20, 2012

My guess is that IF you have already bled/replaced the hydraulic fluid and greased the little bearing and the housing of the push rod on the pressure plate, putting some lithium on the plates won't hurt it.

I greased mine, without having any issues, just to get a smoother action. My belief is that it does not cover any problems, it just gives a more controlled feeling an operation

TomTom

· #6 · Nov 20, 2012 (Edited)

cb4265 said:
Really? Why is this not common knowledge?
Craig

It is...

http://www.ducati.ms/forums/56-superbikes/123775-grabby-shreiking-clutch-how-i-cured.html

People tend to be reluctant as soon as the word grease is mentioned, in this case the grease is much like water in paint, it needs to be there to apply, but then goes away leaving the paint on the wall.

I think we need to call it "Lithium Race Surfacing" lol!

ZDM

· #7 · Nov 20, 2012

Dennie said:
Maybe while the real experts are at this forum A shop cant afford to test things and lose money on customers bikes. At the forum it is different. People try things.

Just use the white lithium grease. It really works!!

+1......just rub the grease into the drive (friction) plates very well. Then wipe clean w/ a new cloth. It does work very well. Also are your "Chinese" springs strong enough? I would replace those w/ either Yoyodyne or Barnett springs...but for some reason the grease does smooth out things a bit.
Mystery of life question I guess......

ducat

· #8 · Nov 20, 2012

Two words. Barnett plates.

Been there thrown them away. Same exact symptoms you described.

cb4265

Discussion Starter · #9 · Nov 20, 2012

ducat said:
Two words. Barnett plates.

Been there thrown them away. Same exact symptoms you described.

This was what I suspected all along.

Thanks,

Craig

JAFA

· #10 · Nov 20, 2012

I've got the same problem as the OP, but my clutch is the stock standard one with 12,000km on it.

davy.j

· #11 · Nov 20, 2012 (Edited)

Your grasping at straws by zeroing in on the Barnett plates, yes Barnett plates are worse than the others for it but all the others do it sooner or later.
It doesn't matter which plates you use, sooner or later your going to end up with a grabby shreiking clutch no matter what hub, drum, plate combination you fit to a Ducati dry clutch.
Llisten to what Tom said and rub some lithium grease on the plates and the problem will just go away and you will be delighted.
The only reason the cure thread wasn't submitted to the hall of knowledge is that I wrote it but was following up on Tom and Vij's original post about it and everyone else thought they were joking or it was silly.
So ..I didn't submit it as it was somebody elses idea originally.
My expensive Sureflex setup started this nonsense a long time ago and grease absolutely fixed it permanently.
I also applied it to my brand new, straight out of the box BNR racing dry clutch on the Daytona project bike and it's a smooth as silk.
Another benefit I've found is when a bike is not used for a few months the steel plates don't rust up on the surfaces like they normally do in a humid climate.

Once again Tom, Vij, a big thanks for the tip as I think it's the idea of the century for Duc clutches
.

.

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oleary

· #12 · Nov 21, 2012

TomTom said:
It is...
http://www.ducati.ms/forums/56-superbikes/123775-grabby-shreiking-clutch-how-i-cured.html

People tend to be reluctant as soon as the word grease is mentioned, in this case the grease is much like water in paint, it needs to be there to apply, but then goes away leaving the paint on the wall.

I think we need to call it "Lithium Race Surfacing" lol!

Has anybody tried this on a wet clutch - like an 848?

cb4265

Discussion Starter · #13 · Nov 21, 2012

oleary said:
has anybody tried this on a wet clutch - like an 848?

WTF

:d

miolta

· #14 · Nov 21, 2012

oleary said:
Has anybody tried this on a wet clutch - like an 848?

I also wonder what kind of people ride these bikes.. :crazy:

oleary

· #15 · Nov 22, 2012 (Edited)

cb4265 said:
WTF

:d

Not near as stupid as it sounds.

I race an 848. I installed a Yoyodyne slipper clutch, which chatters violently when doing a race launch.

Fred Renz - God at Yoyodyne - told me they had the same problem with the GSXR 1000 - LACK OF LUBRICATION!!!

So you can just fuck right off if you have nothing intelligent to say.

FYI, I have been building engines and racing off and on for almost 50 years - and if I have learned anything - it is not to be so god-damn cocky.

Anyway, I am gonna try the lithium trick when I reassemble my current engine.

oleary

· #16 · Nov 22, 2012 (Edited)

miolta said:
I also wonder what kind of people ride these bikes.. :crazy:

And you can just FUCK RIGHT OFF too.

TomTom

· #17 · Nov 22, 2012 (Edited)

Oleary; It should work on any clutch, the discs are essentially the same for oil/dry clutches. Id certainly give it a go as I cant see any downside.
Id love to hear the result, please come back on that.

For the ones thinking its not for a wet clutch; The lithium treatment is NOT about lubrication as I stated clearly.
And if youre discussing something pretty unconventional, be a bit more open minded, will ya

oleary

· #18 · Nov 22, 2012

TomTom said:
Oleary; It should work on any clutch, the discs are essentially the same for oil/dry clutches.

For the ones thinking its not for a wet clutch; The lithium treatment is NOT about lubrication as I stated clearly.

As Fred (at Yoyodyne) explained it to me, they solved (what he thought) was the same problem on the big Suzuki by increasing the oil flow to the clutch area. I am happy it worked, but in our case I agree with you, I don't think it's a lubrication issue either.

So, ... I'm gonna grease up a set of plates (I've got a couple of partially used sets) and give it a try. If it works - cool - if it doesn't then I guess I'll have to start experimenting with different clutch pack suppliers - or maybe convert it to the 848 dry clutch setup.

The search for perfection continues!

cb4265

Discussion Starter · #19 · Nov 22, 2012 (Edited)

oleary said:
Not near as stupid as it sounds.

I race an 848. I installed a Yoyodyne slipper clutch, which chatters violently when doing a race launch.

Fred Renz - God at Yoyodyne - told me they had the same problem with the GSXR 1000 - LACK OF LUBRICATION!!!

So you can just fuck right off if you have nothing intelligent to say.

FYI, I have been building engines and racing off and on for almost 50 years - and if I have learned anything - it is not to be so god-damn cocky.

Anyway, I am gonna try the lithium trick when I reassemble my current engine.

Um sorry you feel that way, I thought we were talking about dry Ducati clutches?

Can someone shine some lime light Oleary's way so he feels better?

I have read all the lithium threads & posts & the reason for my post was to ascertain the the real reasons for the problem.

I will no doubt do the lithium cure, but I was looking for the answer to the cure. Lithium grease is not great when mixed with water, I have an open cover.

I spent 10 years selling Lithium Spray grease as a Sales manager with Wurth Australia & before that 20 odd years in the Automotive game, so I have a clue.

I haven't told anyone to Fuck off lately, I was & am asking for answers that will help all of us ultimately. If you can not articulate how the grease changes things I am still in the dark?

Is this an episode of Hells Kitchen that I missed ?

Oh yeah, sorry I didn't have anything intelligent to say,

Craig

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davy.j

· #20 · Nov 22, 2012

Craig.. stop trying to re-invent the wheel and just grease the bugger.
You logic is also faulty.. you said Lithium grease isn't great when mixed with water and you have an open clutch cover... Isn't that a huge plus?
In the marine game it's widely used to lubricate and waterproof lifting wire cables.
I don't know how lots of modern things work, just know and accept and use them on a daily basis.
.

1 - 20 of 34 Posts

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