Leftover part :(
So I got my carbs off, cleaned, partly rebuilt, and re-attached. Did the same for the petcock. Everything is back on and the bike runs great!
One problem... I have a leftover bolt, collar, and grommet.
I can't for the life of me figure out where they go, and I'm really nervous that something important is going to fall off. Other than the carbs and tank, I also had the ears, thermostat, and radiator cover off, but it doesn't appear to be part of those assemblies. The bolt/collar is similar to those on the radiator, but all those are on.
The bolt and collar are the exact same size and color as the two front fuel tank bolts, but the grommet is a different shape.
Shot in the dark here, but can anyone tell me where this belongs?