Anybody have experience with a 1986 honda spree scotter 50cc? Runs and starts up but always stalls sometimes it will drive for 15 min then stall. I did all the basics changed spark plug, cleaned carb, air filter and exhaust pie and port but it still does the same thing. I don't know what to do. Please help me with some ideals that are common to this Honda 50cc scooter spree year 1986. also I changed the Gas. Any Suggestions?