JC034 XL600V Air Fuel Mixture

UPDATED!
My bike is back to life again. The carb was disassembled and cleaned hard then it was adjusted but wasn't perfect (not to mention the petrol change to octane 100) so I gave it a try again.

However I have a new camera the sound quality is not the best because it was placed at the front to be able to show what I was doing.
To do list before adjustment: - Air filter cleaning (or replacing if required)- Carburettor adjustment if needed (float height, cleaning etc.)- Fixing muffler, carburettor or air leakage if there is any- Having the right petrol (octane!)- Set idle to normal if needed

About the procedure there are many videos on youtube. These two contain everything I needed:   • Idle mixture adjustment (air OR fuel ...  
   • Deceleration Backfire: Easy Carb Tuning  

Summary:The video shows the left side procedure. Unfortunately the fine tuning was filmed only on the right side so I have added that one as a reminder (the idle was decreased and the fine tuning was performed).The warm up was also deleted because of its length but I have done it after setting the factory default for both sides.After the air-fuel mixture adjustment a carb sync was also performed.The result is a nice, smooth operation with no backfiring and with no unwanted vibration.I am 100% OK now with this.