I'd like to thank you all , for your replies , suggestions and ideas.
Final results:
1) Left hand side crankcase cover and stator have been removed
everything underneath checked.(all o.k.)
2) The upper part of the cylinder head has been removed everything
checked(all o.k.)
3) Right hand side crankcase cover clutch assembly , primary gear , oil
pump, and everything else underneath have been removed and checked
(all o.k.)
4) Engine/frame bolts have been re tighten.
5) Oil filters (paper and wire mesh) have been changed and cleaned
respectively
6) Oil changed from "motul 5100 15-50" to "Bel-ray exp 20-50".
(Athens temperature today 25C).
7) Oil pressure checked around 0.3 kp/cm2 at 1300-1500rpm
Nothing obvious fund but the rattle is no longer noticeable (up to now).
I will keep you informed.
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