Hi everyone. New to the forum and relatively new to 2 wheels, and really enjoying it! I have an Aprilia SR 50 moped which a friend had sat in his garage for a while. After replacing parts ( HT coil and lead. spark plug, draining fuel and oil and refilling) I come to start it up. The battery is fully charged and turning the engine over with ease for about 2 cycles, at which point it seems to create too much pressure and not continue turning. I have removed the spark plug and the engine will turn over smoothly (both kick and electric) with no abnormal sounds. however, the oil and fuel mixture seems to be spurting out the top. I have checked the spark plug and ht lead, both work perfectly. I hope I've supplied enough information, if not just ask for more details and what you'd like to know about and I will do my best. I appreciate ANY help anyone can give me! Thanks guys