Finally after hours and literally no help fr local mechanics, i went to a store and bought some joints and hoses, and installed them the right way!
the bike now works really good! I don't know how fast it should be but for sure it doesn't have any problem know, i easily reached 220 kmh
I will post everything about what i did in hope that it can be helpful to other people in the future

 

Nice job! Yea, it's funny how people will just remove things, thinking the bike doesn't need this or that. They they don't understand why it doesn't run as good as it used to. Oh well. Make sure you ride it past the original owners place and let them know how well it's running. LOL. Please do post some pictures and descriptions as I'm sure there will be others in your same position in the future.

 

Imagine if this was the only reason because it only have 5000 km on the clock! Fantastic! Hahaha
now i will buy some good hoses and regular joints (because now is some kind of hand made) , and i will upload everything in detail for sure!

Thank for all the help!

 

Great job, well done another CBR saved and being put to its intended use, they should be good for c.250kmh (on an unrestricted autobahn of course) and at 5000 km it is barely run in