I bought a Piaggio ZIP 4 clock BJ 2006. Test drive was great, so I bought the scooter and drove home about 20 km. Without problems. At home I cleaned the carburettor and opened the Variomatics, removed the D-ring and cleaned the kicker. After I had assembled everything, the scooter didn’t really run out anymore. GIng at the time of giving gas. I then ordered a new carburettor, installed it and the scooter jumped quickly well and ran quietly in the s Tandgas. When giving gas, however, the speed goes up, down, up, down, etc. So it doesn’t really drive and I don’t know what that can be. Spark plug, intake plug and air filter insert have been renewed. I hope someone can help me.