i am trapped with an old 70s moped. Its a jawa sport 2 10. It took a coulple of months but with tinkering i got it to run....45 mph! So now im feeling all happy when the damn thing wont start the very next morning! Im pretty sure its a carb problem but I cant get a new one and i dont know how to make adjustments. It starts on the choke but will just die when I take it off.!!!!!!!!