For street use, I think a good full synthetic 10w30 would be just fine. 15w40 full synthetic would be my likely choice for any sort of endurance or competition..
If it is a flat tappet camshaft and followers, I’d get some extra ZDDP (Zinc) in there Regardless of use (street or track).
Quite true, the coils will overheat and burn up windings when on their side.
I thought that the GT‘s used epoxy filled coils that can be in any orientation..
I would think that. You could insulate that tank from much of that heat - plus the airflow through the nostrils should assist as well. On the Valkyrie, there’s not a lot of options as midship placement would be in the passenger compartment, and not a whole lot of room in the back as I recall.
#1 is the Bobbin Slide where the front clip is supposed to be mounted. The bobbins are to be mounted on either side of the front chassis. Those holes in front of your overflow reservoir are probably the bobbin mounting holes.
#2 looks like it may be a vent for the fuel tank.
My iPhone 14 Pro has built-in Satellite connectivity for emergency use off the grid. I am frequently deep in the desert mountains of Arizona and while I’ve not had to use the service yet, it’s comforting to know it’s there.