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Clutch kit part # 19020051A i fitted this kit to my 750 , no problems as yet

I'm not sure but I think that o-ring is not standard and you'll need an OEM spare part if you find some oil leak

you mean clutch fluid leak?
I`ll try to find one today.

and what about bearing? Could it be that I have only pin with bearing balls?
without any other bearing?

and, what I have noticed - the level of pin, and the level of piston are the same,
shouldnt the pin stick out more? (as it take all power from pressure plate)

in the clutch cover I found spring (!) insted of (screw-)thread

what do you mean by that? There is a spring under the piston.

Could it be that I have only pin with bearing balls?

no. Do you have a picture of your pistons seen from the front ?

and, what I have noticed - the level of pin, and the level of piston are the same,
shouldnt the pin stick out more?

yes, it should. Depending on the piston, the bearing is in it even or may stick out 1mm. The pin itself is a bit over 2mm higher than the piston.

G.

paso750 wrote:

in the clutch cover I found spring (!) insted of (screw-)thread

what do you mean by that? There is a spring under the piston.

Could he have encountered a helicoil or thread-sert that backed out of an engine case bolt hole for the cover?

no, i didnt mean spring under the piston
at the top of the cover, there are 2 (screw-)threads
one for drain, and another for supplying clutch with clutch fluid
and this one was damaged, previous owner instead of repairng
scre thread, just put there a spring

but anyway..

here are 2more photos:
first - after removing pin, and the second after puting the pin

same piston issue in thie thread
http://forums.ducatipaso.org/viewtopic. ... &sk=t&sd=a

Anyway, I can see the outer ring of the bearing (or part of it) still fitted inside the piston.
If you can't pull it out, try to cut it with a dremel grinder, taking a LOT OF CARE not to damage the piston!
Then wash it carefully with nitrous cleaner and grease a bit the seat

just going through the parts catalogues I noticed that that piston shown above is the one from the 906.