Hello dear Com. I really have a big problem. After I have renewed a piston on my son’s scooter, I can no longer get the pushfight on! Rings , piston USW are properly installed….. I have completely resealed the engine. Simmerings are also new. Compression is very good. He gets fuel too. Have a new carburettor and a new membrane block installed. After that he still did not jump on. Then I have a new battery, a new spark plug and a new Zü ndspule with candle plug bought and built in.Zündung is there. CDI has also been renewed. The shit thing still doesn’t start!!!!! Can someone help me or does someone have an idea??? Turn off the dirty thing! Ask for your help! VG Bread Banger