what really caused the smoking effect was :
broken reed valve (who knows for how long) caused insufficient piston-cylinder lubrication because of the fact that when piston was moving to TDC it could not "suck" oil through the oil filter small hole located on the back+top of the crankshaft chamber.
is my theory solid? am i wrong?
anyway, the result was the cylinder surface to become slightly oval, so rings could not seal well(in fact new rings could not seal at all).
i asked at my dealer for the price of a new cylinder and he said 590e.
is it good idea to have my cylinder electrochemically re-coated? (it is obvious that i don't know the right term

)
actually i send the cylinder today to a specialist here in greece to get it done.
he sais that he has the equipment, he needs 2 weeks of work but i simply think he sends it to italy

(no way he has the equipment)
anyhow, the price is 220e and i get 1 year warranty.
anyone tried it? does anyone has a link to somewhere preferably in europe that performs that kind of work?