This I believe is from a late 70s or very early 80s RM Suzuki MX and most likely a 250 Carb is a Mikuni 38mm and running a 6FJ6 needle which would suggest RM250 but I am not 100 per cent  , please study pictures and information carefully as there were several carbs from this era that look similar at first glance     

Jet holder nozzle stamped 327 over R - 8  , twin oval floats and riveted splash plate  

Does have light corrosion from ageing both inside and out also some dirt , Pilot jet is turning freely as is the air screw and carb top , choke working as it should and stays in the " on " position when required , air slide and needle have no appreciable wear , I have not turned float bowl drain plug but I am sure it will be ok as the hexagon bolt head is in good shape 

Has been de greased but will need a proper fine clean and service before use  

Feel free to message me for any more information

SL U3