Extra nipples on my S&S super 81 B carb

What are these extra nipples (one is under the S&S and the other is under the ER in Super)?

Would these have been added aftermarket? If so, why?

Link to pic of my carb: http://s937.photobucket.com/user/rum...ebvxb.jpg.html

Link to pic of a stock carb for sale on ebay: http://www.ebay.com/itm/S-S-SUPER-B-...40888e&vxp=mtr

 

Interesting! You can see on the Ebay carb that the casting has provision for the two additional features on yours, so it looks as if yours is a standard variant of the other one. Probably a factory S&S version for a particular application. The Ebay carb looks the same as the B on S&S's current website. They may be able to help you, if we can't in here. As a fellow S&S owner I have found them very helpful, when answering my emails.

 

I do see the provision for the one, but, not the other one.

hmmmm... perhaps it was for a pressure gauge or something?

This is an extra carb I have laying around - if there is any interest, I am open to offers + shipping

 

One of them is a dimple above the number '2', the other is the square-ish bit to it's right. On your carb it looks a bit like a keyhole, with that threaded thing sticking out.

 

Yeah, and on my carb it is a number "3" - does a 2 and 3 carb have different meanings?

 

I doubt it. I've seen a '1' while looking on line. It may be the mould number used to cast the original body, in other words they mould several castings at a time.