Mikuni question

Thanks for the info, but how can you tell? I have another set of carbs coming and I would like to know how to tell which ones they are as well. And does anyone know where to get parts for the 24's? I found parts for the 29's and 33's. But I never saw anything for 24's.

24's have the ribbed sides on the carbs. They will measure 'about' 24-25mm on the inside of the intake of the carb.
Some rebuild parts are available from z1enterprises.com.