Hey everyone, thanks for the answers. Little update:
I've put in 150 kms already and have had no problems so far, which is indeed in accordance with most of the posts on this thread
contacted Kymco Benelux to ask what jet they put on their stock A50s but since it's been a week and no answer ive just bought an 82 online (which is also taking its time to arrive). Have no idea if it's running lean cos reaching the sparkplug's a bit more annoying than it should be but ah well, it's getting me to 60 kmh /40 mph so I guess it's fine for the moment. Btw, in case anyone is scared about insurance problems and such: where I'm from, the police is to be called only in the case of someone actually getting hurt, and they WILL check your scoot only if there's reason to believe you were driving at more than 45kmh... So basically imo you have to be riding pretty recklessly for that to happen.