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Clutch talk

Started by loopsrider, October 27, 2011, 08:12:17 AM

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loopsrider

I keep hearing the word "slipper clutch"...

Just wondering how many people are aware that the Ducatis they are referring to that have "slipper clutches" do not in fact have true slipper clutches.

A true slipper clutch works from much differently than the simple wet clutches that in fact Ducati uses in it's newer models. Motocross guys use a true mechanical slipper clutch to lessen 4 stroke torque hits and prevent wheel lockup on decleration....much, much different design than a simple wet clutch.



I guess since I'm talking clutches... Is anyone aware of an autoclutch available for the 696? I currently have a Rekluse pro autoclutch in my KTM dirtbike and love it. I don't see anything similar listed on their website.

He Man

most people know that.

thats why most call it a "slipper" clutch and not a slipper clutch.

its actually name is APTC Clutch. I remember reading that the clutch was designed to reduce effort at the lever to increase clutch life and had the added effect as being a "slipper" too.
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duccarlos

Most people realize they don't have a real slipper clutch the first time they get the back wheel hop.
Quote from: polivo on November 16, 2011, 12:18:55 PM
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loopsrider

 [laugh]

OK... Just kept seeing it posted and when I was looking at buying my 696 I had a hell of a time convincing the the salesman that it wasn't a true slipper clutch.



Still would love to find an autoclutch for this bike... wonder if anyone is working on making one?

He Man

tell him ur going to drop 3 gears at 141mph and if the rearwheel hops u want a full refund for the pants your about to shit into.
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DesmoDiva

Quote from: He Man on October 27, 2011, 12:17:36 PM
tell him ur going to drop 3 gears at 141mph and if the rearwheel hops u want a full refund for the pants your about to shit into.


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Speeddog

Quote from: loopsrider on October 27, 2011, 08:12:17 AM
I keep hearing the word "slipper clutch"...

Just wondering how many people are aware that the Ducatis they are referring to that have "slipper clutches" do not in fact have true slipper clutches.

~~~SNIP~~~

The (wet) APTC clutches reduce the clamping force on the plates when the rear wheel is trying to turn the engine.

The dry slipper clutches do the same thing, but with a different mechanism.

How do you define a "true slipper clutch"?
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scduc

I think the term slipper clutch relates to any clutch which allows the torque or engine braking to be reduced by allowing the clutch to "Slip" thus controlling rear wheel under heavy braking or sudden torque.
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loopsrider

#8
Quote from: Speeddog on October 27, 2011, 02:14:02 PM
The (wet) APTC clutches reduce the clamping force on the plates when the rear wheel is trying to turn the engine.

The dry slipper clutches do the same thing, but with a different mechanism.

How do you define a "true slipper clutch"?

Quote from: scduc on October 27, 2011, 04:27:47 PM
I think the term slipper clutch relates to any clutch which allows the torque or engine braking to be reduced by allowing the clutch to "Slip" thus controlling rear wheel under heavy braking or sudden torque.



Yes, that is a true slipper clutch. They really perform well when braking in bad braking bumps.

Here is an example of one that fits by KTM...

http://www.ktm-parts.com/152-2105.html




[laugh] at He-mans suggestion...

ChrisH

Quote from: He Man on October 27, 2011, 12:17:36 PM
tell him ur going to drop 3 gears at 141mph and if the rearwheel hops u want a full refund for the pants your about to shit into.

the monster would have to be able to do 141mph first  [laugh]
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loopsrider

Quote from: ChrisH on October 29, 2011, 02:50:19 PM
the monster would have to be able to do 141mph first  [laugh]


Waddya mean?

Mine will do 141mph.... all on a proper race track of course ;)

Well.... Actually a touch under 140mph (225kph) and then I ran out of road.... errr... umm... track ;)

zooom

Quote from: loopsrider on November 01, 2011, 09:01:14 PM

  and then I ran out of road.... errr... umm... track ;)

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Raux

Quote from: loopsrider on November 01, 2011, 09:01:14 PM

Waddya mean?

Mine will do 141mph.... all on a proper race track of course ;)

Well.... Actually a touch under 140mph (225kph) and then I ran out of road.... errr... umm... track ;)

did you correct for the 8% speedo reading?

ducatiz

The Adler Power Torque Plate (APTC) is a type of slipper, but it also provides an easier clutch pull.

And yes, DP does offer a dry APTC.

http://www.store.commoto.com/ducatistorehypermotardclutchslipperclutches-adleraptcslipperclutchforducatidryclutch-p-29615.html

It's not a traditional slipper (antihoppingkupplung) which is preferred for racing, it's sort of a street style which allows for easier shifting and more forgiving when hard shifting.
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