I had a complete set "80 сс". I have put 49 сс. problem:rupture of a lining of a head. I think of the reason... Probably , curve hands. But. It wasn't in other my motors ... :-/
Sorry, you make no sense whatsoever. Is it that you don't have command of the English (Not in a English speaking country) or lack a coherent sentence? I have had a blown out head gasket like in the second picture. Sorry I cant answer whatever your question is.