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This is going to be interesting. I'm still working on getting a hosting site up and running, and Photo*ucket isn't playing nicely, so I can't post any pictures here. 
If anyone is interested after seeing the description, send your e-mail address or phone number and I'll send some pictures.
This is a set of four Mikuni carbs. They are CV-style carbs, but are NOT the BS series from a GS.
1. First off, the slide is not round, it is flat. About 10mm thick, but flat.
2. The outlet tubes are a nominal 34mm. My quick measurement said 33.86, so I'll call them 34.
3. The "gang rails" are short, and only attached to carbs 2 and 3. Carb #1 is physically bolted to carb #2 and carb #4 is physically bolted to carb #3.
4. The float bowls are about half as high as the BS bowls.
5. Each float bowl has a nipple near the drain screw. I have not removed the bowl to see if that might be part of an overflow or simply a neat, tidy way to have a drain hose.
6. The spacing is the same as the 750 through 1100 8-valve GS engines.
7. The "choke" is a pull knob on the left side that operates plungers similar to the BS carbs.
8. The idle screw is vertical, up between the two center carbs.
9. The throttle cable anchors to a threaded boss on top of carb #3 and pulls up from the middle of the carb bank (the BS carbs pull more toward the front), meaning that the butterflies rotate the opposite direction.
10. Vacuum port for the petcock comes from #3 carb.
11. Vent ports are on #2 and #3, then use a short rubber hose to go to their outboard mates, much like the VM carbs.
12. The fuel inlet is part of #3, then rubber hoses connect the other carbs.
I have not yet opened them up to see what jetting is in there, that might give a clue to what size bike they are for.
If anyone has any ideas or any interest in them, let me know.
.
If anyone is interested after seeing the description, send your e-mail address or phone number and I'll send some pictures.
This is a set of four Mikuni carbs. They are CV-style carbs, but are NOT the BS series from a GS.
1. First off, the slide is not round, it is flat. About 10mm thick, but flat.
2. The outlet tubes are a nominal 34mm. My quick measurement said 33.86, so I'll call them 34.
3. The "gang rails" are short, and only attached to carbs 2 and 3. Carb #1 is physically bolted to carb #2 and carb #4 is physically bolted to carb #3.
4. The float bowls are about half as high as the BS bowls.
5. Each float bowl has a nipple near the drain screw. I have not removed the bowl to see if that might be part of an overflow or simply a neat, tidy way to have a drain hose.
6. The spacing is the same as the 750 through 1100 8-valve GS engines.
7. The "choke" is a pull knob on the left side that operates plungers similar to the BS carbs.
8. The idle screw is vertical, up between the two center carbs.
9. The throttle cable anchors to a threaded boss on top of carb #3 and pulls up from the middle of the carb bank (the BS carbs pull more toward the front), meaning that the butterflies rotate the opposite direction.
10. Vacuum port for the petcock comes from #3 carb.
11. Vent ports are on #2 and #3, then use a short rubber hose to go to their outboard mates, much like the VM carbs.
12. The fuel inlet is part of #3, then rubber hoses connect the other carbs.
I have not yet opened them up to see what jetting is in there, that might give a clue to what size bike they are for.
If anyone has any ideas or any interest in them, let me know.
.
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