Originally Posted by Injuneer

Your expectations are not realistic. There is no way anyone here who is not the manufacturer of the clutch can guarantee you that the product you receive will be perfectly balanced. Just because they bought a specific model # and had no problems with it, there is no way they can assure you that what you purchase and have shipped to Turkey will be EXACTLY the same as the product they purchased. As you can see from the comments 1) the manufacturer may change the sourcing of components; 2) the manufacturer may change the design of the product; 3) the manufacturer may not have 100% quality control.

Since it appears you bought a new clutch assembly, and it was not properly balanced, there must be someone/somewhere in the country of Turkey that has the equipment required to balance your current assembly, and is capable of doing so. You are not limited to having this work performed by a "mechanic".

It is not fair to expect someone to assure you WITH ABSOLUTE CERTAINTY that the clutch you receive will be perfect. They can only tell you what their experience was IN THE PAST. You need to understand that because they received a good one, they cannot guarantee that you will also.