Aprilia Sr50 will no longer start!

I have a huge problem with my Aprilia Sr50 LC TYPE VERSION: RL. Wanted to start driving is then drunk on the light gas since it doesn’t run anymore. I removed the carburettor cleaned spark plug and looked, she was a bit black then dried it with a cloth & cleaned slightly deer brown was it, then I tested it after a spark also there. Again everything installed new Malossi air filter, petrol hose, vacuum hose renewed still no sign of life. I already thought the petrol pump would have been in the bucket tested the vacuum which is also there :/ I kicked the soul out of the scooter, and with the e Stater he only goes ahead and eats the energy out of the battery. I really don’t know any more :/ INFO: Swimmer needle misses but was reordered am strangely also without a needle drove that only when I cleaned the carburettor. I felt the float manually at the bottom pressure hose squeezing nevertheless it jumps net at Ps the previous owner has installed a new cylinder kit & given cooling liquid to it, rather not think that it is then on the cylinder.