there must be a little smoke try to keep a hand behind the end-can the bikes catalyst can may be burn the smoke, but the oil looks rather dark and dirty i do oil change after 10000 km and have never got that oil colorThere is no smoke at all
If the rings are not available, then no amount of decarbonization will help without disassembling the engine. The only thing that you can clean the combustion chamber, but the oil zhor will not stop. I repeat, zhor appeared at 360 km.If the bike has been dropped a lot and oil overfilled, you could get oil in the combustion chamber. Then a piece of burnt carbon could get between the ring and cylinderwall effecting compression and oil consumption.
Replace 1/2 quart of oil with marvel mystery oil, run for a few miles to get good and hot and replace oil. Good cleaner. Run a good quality fuel injector cleaner too. You might get some of that carbon dysolved off the rings and cylinder engine casings.
2 questions,My motorcycle has always been serviced in a timely manner, and in hot conditions, but the oil has been changed no later than 5k. Filled with Eni 10-30