1980enduro

I have two different carberators. The one that came with the bike initially had the bike running a bit gunky and it flooded the carb and was always leaking. I purchased a overhaul kit but all the pieces I received were incorrectly sized. They were all to big. I called a small owner repair-man and asked him to look at my machine and he couldn't get it work. I ended up buying a drop-in, new carb to put in. Now no matter what i do with this new larger carb (the pieces from the overhaul kit fit this carb) it always runs wide open. I am not sure if the bike is just a differnt year, or if it is a failed project. The serial number is 3J0-002414 I haven't been able to find anything on those digits. Any suggestions would be greatly appreciated. I have hit my wall with this small engine. If it isn't stated, this is a "1980" enduro 125