Keihin PE35A  Carburettor baffle plate , I believe fits models and years below but please study pictures carefully to ensure this is correct for your needs 

Not sold by Honda or Keihin as a spare so no identifying part number 

CR125 81-82 , CR250 81-82 , ATC250 83-84 ??  

In good used condition , has had a de grease but will benefit from a further fine clean before use 

Feel free to message me for any more information

SL U4