The spark plug is a crucial and vulnerable part on your two stroke engine. The spark plug must be clean, and must be replaced promptly when signs of wear begin to show. The condition of the spark plug can tell you a lot about how your scooter motor is running. The spark plug should be a light brown or golden color. If the electrode is white, that can be a sign that your scooter is running too hot. This can be a result of either running too lean, or that the fuel and oil mixture is too lean. If you are running your scooter to rich then your spark plug may be black, covered with gas, oil, or carbon. This should be checked by assuring the electrode has a clean gap of .023 in. If you are having a problem with fouling, just be sure that the gap is clean and free of obstruction, a small piece of fine grit sandpaper usually works well for this. New spark plugs can be purchased at almost any local hardware or auto parts store.