You need to take care of that LMT. they are NLA. Sometimes just a cleaning of the bowl and needle/seat area will get a good run.
If you use it's part number to get another you will be directed to a Nikki, Ruxing, and China clones.
Do not mess up the main nozzle. Use a hollow ground gunsmith screwdriver and if it won't come out easy just clean the carb and leave the nozzle in place. Sometimes it does not need removed.
What are the symptoms of yours?