Hello, I have a problem with my scooter. I used to buy it from the dealer and always had problems with it. As soon as he stood for a week or two he only jumped on with the greatest effort or not at all. He was several times at the dealer, but always when he was there everything was ok. He then changed the carburettor. After that I had problems with quite smoke clouds from the exhaust. The dealer then found that the oil pump is defective. Since the exchange it runs well, but I still have problems with it. If he is not driven for a two weeks he only starts with Start Spray. The last time I screwed in a new spark plug. After that I drove to my girlfriend and the next day back again. Per way it is a maximum of 10 minutes. After that I screwed out the spark plug again and it is quite black (see photos). Is this normal? Have read this a black ignition image (or as you call it) a Zei So far I only know the two screws for the stand gas and the mixture. Where the candle is in it is also everything quite black and sooty. Don’t know exactly if this can be seen so well on the photos. Can someone help me? Thank you very much.