Hey Got an Italjet Formula 50 AC bj97 I for with the scooter on a Holprigen mountain path until he went out once in a while… Of course I tried to get him again and again… When I pushed him home, and looked again at that the spark plug was loose and light grey… I screwed it again pure tried to start up and NOTHING! I bought her a new ZK and thought she jumped anyway… But still NOTHING! What could that be petrol + ignition spark are d a… Please urgently need your help…