Rollernewpurchase 50ccm.My original remains

Hello everyone, in advance,I am in possession of motorcycle, car and truck license.Have now 275km with my new scooter(2strokes) behind me,and ask me why so many of their 50s scooters,whether mofa or not,do not leave it original and tune it. Still in the drive-in time(Yes, there are people who do that)and must say,I am already very satisfied with the current performance.I can’t understand why some of them change the Vario, install bigger cylinders or anything else.People,you have You have chosen the (your) scooter yourself, whether 25 or 45kmh.Then they can only drive 25 or 45kmh.And honestly, 70kmh on`m mofa are not the racer either.Whoever has driven far more than 200kmh on`m motorcycle, the 70 don ́t cut off the stool.My scooter stays the way it is.I don ́t see any reason to change anything.With law and insurance everything should be correct.How do you see this?Please have a lively discussion. MfG Tom