I don't know if this has been posted before but since I've seen some recent confusion about it here goes.
Working part time at a Yamaha dealership one of the things I do is read through the Technical update manuals looking for things that might help the Techs. As I was reading through the list of older updates I ran across a reference to a 1600 Road Star float level update in the 2000 update manual. As luck would have it we still had the 2000 manual.
I looked it up and there it was - The 2-3 mm
below the bowl seam in the original service manual was incorrect and should have read 4-5 mm's ABOVE the float bowl seam. The update page had a drawing like in the original service manual showing the incorrect spec and another drawing showing how the correct measurement would look.
Even though the 1700 wasn't around at the time, as it turns out the float level spec for the 1600 and 1700 is officially exactly the same.
Hope this clears up the confusion I've seen over the years - did for me.
Edit: And that's the spec with the carb
mounted on the bike.