Hello, got my scooter out of the city of work a week ago. First everything went well but now it hardly accelerates any more and doesn’t bring his vmax anymore… he sounds like he’s scratching off any moment. As soon as I start him and give him some gas I always hear sonen “kling” sound as if something jumps up where. On the city sheet also the drive belt was covered. (Can it be that?) ICh don’t have or no idea of scooters and would like to know what d hese Synthome inform and if I can not get it “alone”. thanks for any help