Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 999 / 749 > clutch thinkness

[nelly]

There are two types of plate in the clutch. The friction plates and the plain steel plates. All the friction plates are the same. There are three types of plain steel plate. 2mm thick, 1.5mm and a 1.5mm dished plate. There is usually one dished plate in the pack, near the back. It's usually bright finished and there is a dot punched in the face near the half round cutout in the perimeter. The other plates are used to build the pack thickness out, varying the quantity of 2mm and 1.5mm plates allows for the wear in the friction plates to be compensated for.
The friction plates can have two types of friction material on them. Organic types are bonded (glued) on and, more commonly, sintered types are the "electronically" applied type you speak of. Sintering is carried out by prssing the friction material in place under very high pressures and then bonding in place using heat (lots of it).
The pictures in the manuals tend to be "generic" and require "interpretation" to make sense of them.
The 2.7mm wear limit refers to the stock clutches where 6 or 7 friction plates are used. SPS's for instance use 8 thinner plates..................
It gets confusing hereonin
Inspect the friction plates with your common sense glasses on. Look for uneven wear, and the friction pads breaking up. Look at the plain steel plates for signs of slippage.
Build the pack up in your hand and measure it's thickness (not your hand ) it should be 35 - 36mm. If it's too thin, replace a 1.5mm plate with a 2mm and vice versa.
the pack build up, for a conventional clutch, is 2 plain plates, a friction, then the dished plate with dot facing outwards, then alternate the plates until you finish with a plain plate. This protects the pressure plate from wearing out on a friction plate.

you did ask