Scooter no longer jumps to cylinder change

Hello I have the following problem I had a piston eater now I have bought a nine cylinder and piston I have removed the old cylinder and piston and inserted a new seal (paper) then I have built the cylinder and piston together and properly screwed full of joy at driving kick the scooter and then nothing comes with e starter also did not try almost 2 days he starts ignition spark is there gasoline also what can be that or what have I fa Included