Super Jet Help identifying a Mikuni SBN carb (44mm or 46mm)

Bought a ski that had a set of "silver" colored Mikuni SBN carbs. Looked at the SBN manual and it appears that both the 44mm and 46mm versions came in silver (see attached image). I don't see any discernible model or part numbers on them.
Has anyone ever taken a set of calipers and measured the opening of either size carbs?

I'll upload a pic of them when I get home. ---> OK So here are the updated pics and stagesrt4 was correct. It appears that the base opening of each carb is approximately 1mm larger than it's stated size (see pics below)
Mikuni-SBN-specs.jpgCarbs01.jpgCarbs02.jpg
 
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RivMan

doing something stupid...
Site Supporter
Location
Pinckney, MI
Post a photo of the bottom of the carb. The machined step at the mounting flange is a different depth between the 46 and 44.

-Rob
 
Location
Oregon
Reviving this as I need to identify a set of carbs 44mm or 46mm.

The actual bore where the butterfly sits is 1.813" or 46.05mm. So I'm assuming these are 46's?

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