Blown motor

So i am not having a good week as the title would say. I am looking for a new motor for a kz750e 1983 if anyone would know of one thats working and for sale in Germany or even europe i would appreciate the help. I want to keep my bike going and no shop in Berlin is willing to do the engine work everyone says new engine. So if anyone can help please contact me. Thanks for reading

What is actually wrong with it? (any replacement is going to be a least 40 years old with no history !!)

So there is nothing to loose by taking it apart and seeing what it needs
Blown can mean a lot of things
Dave

I agree.  "Exploratory disassembly" may save a lot of trouble.

I blew the engine on my 82 kz305 last summer. Was concidering parting out the bike or getting a new engine. But ended up tearing the top end down, and found I could get it running again with a minimal amount of money. The fix was replacing the broken timing chain, 2 bent exhaust valves, new top end gaskets and seals. For around $200.00 it is up and running again. I took it on a 2 hour ride last week and it is running fine.