So I'm cleaning my carbs and I tipped them upside down and a little ball bearing that looks like a bb and a spring came out and I don' know from where or what they are. I have looked up a diagram online and from what I see it says it' the detent ball and spring. Does anyone know what this is and where it goes? Thank you

Hi brando,   a detent spring  purpose  ,,is to hold somthing in place,   , maybe the choke lever,  what type of carbs ?  

There you go, full carb diagram with scrollable pics and numbers and arrows to where stuff should be. https://www.bikebandit.com/oem-parts/1979-yamaha-xs750-xs750f-carburetor/o/m147174sch225700

hope that helps..! From what you describe might be numbers 58 and 59.

at least you found it, first time mine got lost on the garage floor