Good evening, I bought myself a Rex 50 2 weeks ago to drive to work with it. Only when I turn on the scooter, it runs very weak. When I then give gas it usually goes out. I bought and installed a new air filter and a new battery. Since I otherwise have less idea of scooter, I don’t know any more. Here are some more data: Rex 50 (50ccm) 2 clock Minarelli engine lying standard exhaust and otherwise everything standart. r say what I can do. Thanks already in advance Kallekup