Tach, I bought a used Malaguti F15 yesterday (8000km). Then he started stuttering after about 20 minutes on his way home. Shortly afterwards he went out. I figured everything had to be the spark plug. I cleaned it up and went on. 20 minutes later the same game. Spark plug out, cleaned & back in. Then again the stutter and then again nothing went I stopped and a huge smoke cloud came to me from the engine area. Küh I water dripped on the cylinder. Yes the part estimated 50km pushed on there left and right were only corn fields. At a Mazda dealer at half past 10 and this morning immediately called that I pick up the part and also made it. My father had picked me up by the way. So today again spark plug cleaned. New cooling water filled in but there was nothing there. I occupied myself with the part all day and every single hose, whether from petrol or from the cooling water But no reaction from the oh so great Minarelli engine. I hope you can help me and forgive my short story! ;D