Peugeut Speedfight doesn’t start at all

Hello people, the following history: I bought myself a used speedfight 2 a year ago, because I moved to the city for my studies and don’t need a car, but a scooter can be very practical. Since I have the scooter, he has started problems. The longer he stands (+1 day) the worse. Then it usually only goes with starter spray into the ventilation pipe, but then it always goes directly. So far so good, will probably be a gassing attitude. Now the Rol I have now: – of course if there is enough petrol in it – engine oil refilled, was quite empty but the warning light was not shining yet – the spark plug renewed Now I wanted to check tomorrow if I have ignition (hold sparks on mass & see if sparks spray) and on Thursday I get a measuring device for compression. If both should work, what can I check? To the ignition behavior: Be In the e-starter the variomatic race as if the engine started at any moment, but then does not. Thousand thanks to you already, if you need more information, please ask me. Best regards Marlon