Replace keyswitch or key. I think it is actually a badly cut key that makes my bike's switch glitchy to use. But we'll see. The early, horizontally mounted switches are proven to be much higher quality than the later vertical ones so this trouble is surprising and why I think it's the key.
Install one of the CBX's two horns. Unobtrusive, not over-the-top. And not as much a departure from stock as Fiamms or Stobels would be (and which I have worked with before).
Install RD350 brake caliper and larger CB750-sized aftermarket cast iron disc. The object is an incremental braking performance improvement (via the opposed-piston caliper, the larger disc diameter, and the disc's cast iron construction) with as close to stock appearance as possible. The parts are already in hand. It looks like I may need to fit 750 fork sliders to match the larger disc.
Install Pingel or Golan petcock. On a bike that surface-mounts its petcock via screws, this will be a challenge. The stock early zinc-based petcock is way under-engineered, really a disappointing example of uncharacteristicly low quality for Honda. Being made of "pot metal", it's actually unsafe.
Try 20W-60 synthetic oil in my quest for optimum hot-engine shifting. Will likely be experimenting with ways to improve shifting for a while.
Complete second stage of top end mods (see the first stage here). Right now the plan includes 64.5mm pistons, a modified 650 head, a modded 650 crankshaft, and 30mm Yamaha snowmobile flat slide carbs. I've actually been planning this for a very long time.
I may want to make the primary chain tensioner I installed in 2024 manually adjustable. This means the oil pan will have to be removed every once in a while, but that is something I already do anyway. Solely spring supported chain tensioners are known to withstand only very light loads. Manual tensioning will increase the tensioner's effectiveness
Bend or remove kickstart lever. On my first CB500 back in the 70s I heated and bent it to make it tuck in better. I am reluctant to remove the part for aesthetic reasons, so bending is preferrable.
Third stage of current quick throttle mod. This will involve an aftermarket quick throttle assembly. Back in the 70s there was an Italian-made one that I used on my first CB500. That one is not to be found now, but I hope to replicate it by adapting one of the many available out of China. The Yoshimura one is nice, but not as stealth as I like.