Thanks for the replies. Those cylinders were in the box with the carbs but not inside the carbs. There is no mention of them on the exploded view in the book that came with them. I disassembled one of the carbs and there is a spot where I can see that they might go but I cannot figure out what the purpose of them could possibly be. There has to be someone out there that has these exact carbs and knows what they are for, right?