I pedle the bike off as you normally would pop the clutch and it acts like it wants to run as long as you keep pedling if you dont it dies with in a few seconds, I thought maybe it just needed to to warm up so I started it and pulled the clutch. it died instantly I have checked and cleaned the spark plug I dont know what to do now. ( resantly changed out the magnito in the engine) 80cc engine on a shwin point beach