Sounds like you probably have a few minor issues...the spark-plug falling out has nothing to do with your tire spinning; just make sure you tighten it down properly. Your clutch-plate is likely too loose and probably WAS tight enough earlier. This points to the star-nut that keeps the clutch-plate adjusted properly loosening up. Check that this star-nut's small securing phillips-head screw hasn't fallen out. Do a search on here to find the proper clutch-adjustment procedures. One last thing: I ASSUME you have a 2-stroke China Girl. Be more specific on your model when asking for help. Also; INTRODUCE YOURSELF! You're asking for help in the wrong forum. Finally: WELCOME!!! You're in for some FUN!