Ducati Sporting Club UK > General > Idle Chat > Everybody loves a knowall ...

[electricsheep]

Originally posted by tp-996

The wine box ...

BTW when you get the slipper make sure you get the right type..
I'm sure one of the real experts will advise, but it's something to do with ramps and balls, sorry I mean ballbearings

[Edited on 3-2-2005 by electricsheep]

[NBs996]

From memory of a previous post, which I can't find, there's two different types.
They both work on the principle of ramps in the clutch drum forcing the pressure plate to ride up under back-torque. One type has bearings separating the ramps, the other type doesn't.

I'd assume the bearings would make for a smoother and more consistent action, where the ramps w/o bearings would act different under varying temperatures. Simple physics.

Can someone correct me, or expand on that one please??

[Redruth]

Originally posted by monstermob 998

GET A CHEAP ELECTRIC LEAF BLOWER FROM ----ARGOS? WASH BIKE --BLOW WATER OFF -- JOB DONE
works for me

Do you know, that's bloody marvellous. I have a leaf hoover/blower. I was gonna give it away. But of course, it could do that job. Flippin' 'eck. Fancy that big green useless piece of black & decker kit could actually do some good! I will try that tomorrow evening after riding into town.

Cheers, monstermob.

[monstermob 998]

thought of this when i was sat in car wash whilst haveing the car blow dried!!!!advantage is when you give your bike a spray with wd40 or what ever the water doesnt get trapped in behind the wd40 and the white deposits left by the water on your waxed paint work are history!!!

[JPM]

OK, another question, I have my own understanding of it, but lets see if 1. I am right/wrong 2. there's a far more plausible answer 3. complete tripe...

Dished plates in the clutch.... why?

[chief]

Who cares, about all this...... the faster you go the bigger the smile

Never mind blip blip blop

Redruth,
I'm disqualified?

What about expanding this competition.........
Who's got the best avatar?........................................... KwickBitch?
Who's the richest?.......................................... ...............Lord Rattler?
Who's the funniest?......................................... ..............Dave W, Dibble?
Who winges the most?............................................. .....?????

Just a thought

[NBs996]

Originally posted by jpmercer
OK, another question, I have my own understanding of it, but lets see if 1. I am right/wrong 2. there's a far more plausible answer 3. complete tripe...

Dished plates in the clutch.... why?

I'd've thought it would be to help keep them in line, stop them moving sideways. Cos if the offset slightly from central then the clutch would shake itself to bits!

What's your theory then JPM?

[JPM]

I didn't think of that.... mine would be proper engagement/disengagement of the clutch, adding an element of play into the clutch pack, but I have no facts or figures to back that up.

[748mart]

My guess is the dished plate provides a bit of 'springiness' to the clutch pack, smoother engagement, less squeal.

[Shazaam!]

Dished Clutch Plates

During acceleration the clutch is prevented from slipping by the frictional force between plates. The higher the torque output of the engine, the more frictional force that is required. In order to get more frictional force, you need more force to push the plates together. The force holding the plates together is determined by the compression of the clutch springs, which in turn, is controlled by the stiffness of the springs and the amount that they are compressed, i.e. the height of the clutch plate stack.

There are two values of frictional force that can exist between the clutch plates: static and sliding. The coefficient of static friction is always higher than the coefficient of sliding friction.

Smooth progressive clutch engagement requires that the force transition between sliding and static occur gradually, and this is why a curved dished plate is placed in the clutch plate stack.

When the clutch lever is released, the push-rod moves the pressure plate, which in turn moves the slipping plates together, transmitting increasingly higher torque to the rear wheel. At some point, the force between plates is sufficient to cause a transition between static and sliding and the difference in the two coefficient of friction results in an abrupt change in torque output. The clutch grabs suddenly.

To minimize this suddenness, a dished plate is added to the plate stack. A dished plate is essentially a spring that exerts a force between the plates when it becomes flattened so as to give a more progressive force between plates than can be achieved using the stiffer clutch springs.