On the link below :
http://dl.transfer.ro/XT600_1984_int...-63d6b8428.rar
i have uploaded you :
* 2 editions of English microfiches. 50 and 67 pages, little differences between them, but i thought to send both. Perhaps if you study them more than the 30 sec. i spent you`ll see that they are different and both important.
* An Italian service manual - it has 140 Pages, very good and undersandable (i.m.o., as being Romanian i understand Italian easier). In the worst case scenario, Google Translate.
* The Yamaha XT600Z Tenere 34L (1983-1985) German Microfiches. 46 pages. From my knowledge it is the same engine. Your only duty is to compare these microfiches with the XT600 ones and see if i`m right. If they have the same engine (in addition to compare the exploded images you`ll be 1000 % sure if most of the parts have the same series). If they do, than these microfiches will be very very helpfull because they have all the measures for the torque/dynamometric wrench and all the wear limits for the components.
* The Yamaha TT600 K 1984 English Service Manual. 168 pages, quite complete. I send it as it explains very good lots of processes and because i believe (not sure, so don`t shoot please) that this model shares lots of things with yours.
All the best and all the efficiency you can have in your work

!
P.S. - The files will be available for aprox. 10 days on this free upload site. If anybody will later need them - PM.