Hello Faria!
Sounds like you've got a mess to deal with there. Can't help but wonder why one would start the job and quit it and sell. Doesn't sound good buddy.

But maybe the previous owner just gave up.
IF you decide to go in there, I'd
highly recommend having the "manual" beside you. Lots of timing marks and stuff to get lined up just right. It's rather involved to just try and talk you through it.
Here is a link to some manuals to download.
Yahoo! Briefcase - List View
Also review this thread...
http://www.suzuki-forums.com/1g-1999...tensioner.html
Good luck and please keep us posted!
Max