This Keihin 16mm carb came as a spare with my Honda MB5; it is the stock MB5 carb. My bike came with a Mikuni 20mm, so I haven't had this carb on a running bike. I've taken a look inside and everything is there, though, and looks good. Float doesn't have any cracks that I can see. It's the flange fitting used on a lot of Honda peds and small bikes.
Pics soon of the actual carb. The one I've included with this post is not my carb, just one I found on the internets.
25 plus shipping.