I may have found the source of a tiny drip that I see happening under the bike. Not going to worry about this though.
The oil that I drained from this bike was classic burned black water and typical for people that only buy the cheapest shit for their bikes. While the oil -is- the blood of an engine.
I replaced the oil, changed the filter and will change the drive shaft oil too again. The engine runs so much better and quieter now.
Oil, people. Buy proper stuff!!