While she's apart again for the driving light and horn wiring I also put in a couple of extended vacuum hoses for the TB Sync that she may need someday (running perfectly at the moment). I see here that people are using 3/16" (4.8mm) so I went and bought a length of 3/16" fuel hose. I always use fuel hose for vacuum - sturdy and will last forever. WELL, 3/16" is too big. It very easily slides onto the vcuum nipples and I really think that will create a vacuum leak. What I did was put a skinny 4" cable tie around the end of the hose a pulled it as tight as I could without tools before putting the hose on the nipples. This made the ID small enough to require needlenose pliers to push them onto the nipples. Now I just need to pick up a couple of 3/16" vacuum caps and put the "TB Sync Rear" and "TB Sync Front" labels on the hoses.
So, note for others - do what I did for the better hose material OR get 5/32" (4mm) hose which is the correct size.
When I took her apart days ago, I saw that the air filter was pretty dirty - mostly debris and bugs. It is still reasonably white and is an original Suzuki filter so I'll blow that out before re-assembly. I don't have any metal fly screen material on hand and not sure the nylon/polyester/whatever mesh I do have will stand the heat, so I'll sort that out the next time.
Seeing she's fully exposed I did spray some Gunk Engine Degreaser everywhere yesterday, let it soak, rinsed and then repeated with Simple Green and a brush and more rinsing. Looks much better now.
Today (or, I should say next) I will plug in the new horn relay, see if I can remember how to put the airbox back on and put the rest of her back together.