Aprilia SR 50 no longer starts

Moin to all scooter experts, I woke up my Aprilia SR50 Street LC 2009 from an 8-year hibernation and wanted to make it fit. The first start went with the kick starter after 10. After that I changed battery, candle, fuel and cleaned the carburetor. Swimmers and nozzles are new. Carburetor is a Dellorto 17,5. All series. After the carburetor cleaning nothing went at all. I then put the gas slide needle on level 2. Then he went after felt 50 He ran for about 15 minutes in the stand and also took on gas and then it was always bad until he went out. Then I dared to make some start attempts but without success. The next day he jumped again for 30 seconds. Then again nothing. That went now 2-3 days so that he started after 24 hours. But then went out. Candle was light brown and dry after the 15 min test run. However, he has squirted quite blue. I am desperate. Air filter nozzle is also new so I’ve got some advice for me.