Hyosung RT 125 Karion runs to fat, constantly black spark plug

A nice hello from Stuttgart, would be very happy about some help, to my problem with my newly purchased, but nevertheless already in the years come 125 RT Karion, year 2004 with almost 14,000 km mileage. At the moped seems to be still so far still in the original condition. When I bought it about 10 days ago quite cheap and defective, the moped had no spark of ignition and my predecessor had not found the error regarding ignition sparks after the (winter), the moped stood loud The reason for the missing sparks were the two defective PickUp cables (cable breaks) which came from the LiMa. After this was repaired I had a really rich and strong blue/white spark again and the moped immediately also jumped on and runs in the stand gas. The moped then chuckled but then gave the gas and is constantly dying – then I looked at the NEW spark plug which completely black but was dry, which actually speaks for a too fat setting. All settings on the mixing screw aben no use, standard setting for this would be 1,75 twists. I then disassembled the carburettor several times and properly cleaned and blown through, I determined that the float level was not correct and then set it to 12,5mm on WHB specification. The main nozzle 102 as well as the auxiliary nozzle 38/(100) are also according to WH B the original spraying. Air filters I also cleaned and that did not do anything. Now I’m slowly with my Latin at the end have me now alternatively a jet set worried to try it times with smaller nozzles, but if everything is in the Ori. condition should the thing nevertheless run properly? Would be really awesome if someone here has solved a similar problem and could kindly provide me with some help – would be very grateful for that. ne for the trips to work and when going to the city and for that the moped would be really ideal.