CPI Oliver Sport goes out while driving!

Hello together! I drove today with my sister’s scooter (in case of rain). After about 5 minutes of full drive at approx. 65 km/h the scooter did not take any more gas. I rolled out and the engine went straight out! After I was standing I could not start the scooter any more. About the E-start was only a cracking relay to hear. But what surprised me even more was that the kick starter was apparently blocked like! It was not possible to move the kick lever. I pushed the scooter home n, here and there a bit shaken, but nothing happened! So first breakfast and let go! After the meal I got the scooter really started again. also the kick worked again. However, he drove only about 40 km/h stuttered at certain gas position and went out again several times. Same problem no E-start no Kickstart At some point the new(!!!) gel battery was also empty. A few hours of recharge-clamped – started scooter ran (bad). Then the rear light went off (brake light and headlights were intact) . The scooter went off again and now it does absolutely no more mucks! No relay clapping no nothing at all! The petrol filter was replaced after the throttle of the scooter 5 days ago (roller stood a year ago) By the way a sports exhaust was installed and a distance ring (though used to throttle) removed. I noticed that I really like to drive scooters despite my own cars, but solc I want to drive this thing and I don’t want to push the mill all the time! Can you professionals help me, I don’t even have the touch of a clue! Thanks in advance guys (and girls)