Greetings to the professionals So, we have a real problem My brother has a scooter that absolutely doesn’t want to run!!! Is n Aprillia … (what do I know) and it doesn’t work anymore!! So when he turns on the gas tap the speed goes up to a certain point and then he just goes out!!! He starts to stutter for a short time and then it’s over As I got it, it’s even so that if he stops the battery (which was previously jammed) the speed is right again g rises, and it works so far, except that the bike then turns BACKWARDS!!! He himself is a trained car mechanic and really knows about scooters. He has been repairing the things for years and takes care of almost everyone in the place. What I mean by that is that he really has a clue!! In addition, he has changed almost every part of his scooter, but he still doesn’t run as he should!!! Oh, he had a broken crankwell e, but has a new one in it, and the manufacturers didn’t think it was because of it and they would never have experienced it before!!! I’m sorry that the information is so poor and that I still had to write so much… Hope you can help us somehow. P.S. He was already in a workshop, but they could not find the error, but something has to be broken, right? already thanks in advance THX Sam