1098 Refitting Clutch Plates

Just put them in any way. Look out for the convex plate. This has a dot painted on one of the splines. If you have a centre punch then redo the dot permanently. The pressure plates usually have a dot by the hole that goes over the slotted post. If not you will have to use trial and error to get the plate orientated correctly on the posts.

 

in short no......

there are 1.5mm thick and 2mm thick steel plates and there is a dished spring plate as well that can be fitted in 1 2 or 4 depending on the type of clutch.....

 

Nope. Leave the clutch the way the factory suggest. They have a very good idea of what they're doing. The only real way to quieten the clutch is to fit new plates, but as these wear, the noise will return

 

I think I came accross an article about clutches on the sigma website I'll have a look for it !

 

This whole wretched subject has consumed my waking hours for weeks now. If you have a slipper clutch you start with a friction plate and alternate with a steel plate. If you have a recent sintered friction plate set it appears that Ducati have reduced the number of friction plates from 9 to 8 and you put a second steel plate in last to make up the pack thickness. If you have a standard road clutch with brake like friction material you start with a steel plate and alternate with friction plates and ending again with two steel plates. The nominal thickness of a set of friction plates is 22.5mm regardless of material and the overall thickness of the complete pack is 36.5mm. You get at least one 1.5mm thick steel plate to get as close to the 36.5mm figure. The sintered pack comes with one dished plate usually 1.5mm thick, seven 2mm thick plates and one 1.5mm ordinary plate. A dished plate is often fitted to help reduce the rattle and the graunching noise as the clutch plates clamp up. If you include this dished plate you need to come up with a combination of 2mm and 1.5mm sreel plates to get as close to 36.5mm without going over. Going back to the 916, the small nibbled edge of the steel plates helped line up everything but today it is less important although if you are OCD you will of course want to line everything up. If your clutch pack didn't have a dished steel plate and it didn't annoy you with unpleasant noises, don't fit one. If it annoyed the f**k out of you, try putting in one instead of the 1.5mm plain plate that is there. I'm now running a pair of dished plates in a 748R slipper because that is what works but it's a ball ache getting the right thickness as the friction plates wear. If you are running an EVR clutch then all advice is irrelevant because they offer a variety of thickness friction plates as well as 12, 37 and 48 toothed plates. Arrrghhh ! Andy

 

I thought the notched metal plates were to be placed in any position, not lined up. But they're so the clutch isn't balanced and the plates don't stick together !
Also in a sigma clutch there's 2 dished plates which apparently helps a twin cylinder engine when doing race starts (I still can't get a good start) did have a practice at a drag strip but couldn't quite get under 10 seconds ??

 

Ive put 2 dished plates in my slipper clutch. Makes pulling away less graunchy. JHP sell them. Bout £4 each.

 

After reading thru sigma performance website there's 4 dished plates in there clutch !!