Hello P
I'll try to reply to some of your points...
Engine Temp - No idea unless you install an oil temperature gauge as an accessorize. I know some have done it. Let them reply here...
Headlamp Clips - Sorry again never had to remove the headlamps. So....
Drivetrain - Before the gearbox you have the Centa drive, which mission is to absorb the high torque peaks the big V-Twin produces. It uses four "rollers" made out of an elastomer compound. At low rpm and low speeds, you can hear them “clonging” inside the Centa bell house. I guess this is the sound you talk about.
Seat bases - As yours, mine do not really seat flat and behind the bar. Because of the heating seats ' connectors / wires, and maybe because the seat is just few mm too long. But it doesn’t move when you're in. However, I'll soon lift the front part of the seat using a simple wood piece, that will be screwed underneath the seat and will be placed to be just behind the front bar. So, the whole gets more secure, the heating seats' cables and connectors won't be "crushed" and I will gain some comfort as the front of the seat will fit better below my legs being higher.
