Well, I might say this:
About the camshaft: many of them will show wear in the area where the rocker foot contacts the cam lobe. This is entirely normal, but means it has lost a little bit of performance: it will NOT hurt the engine to put those parts back in and run it again if you cannot find another cam. It will work best if you put the same rockers back in the smae places where they were, so the cam and rockers will again run as they were. You can run it that way until you find another cam someday: I used to 'refurbish' these bikes this way for poor college students, who rode them many years afterward with just new rings installed and a light hone of the cylinders, everything else was left the same (except I would clean the valves and relpa them for good sealing).
The pistons: if you keep the same pistons and rings, you don't need to rehone the cylinders. If you install new rings you DO need to hone the cylinders for 2 reasons:
1. The new rings require a honed cylinder wall to break them in and seal, and
2. At the very top of the cylinders you will notice a slight unworn ring around the top (this is called "the ridge") where the piston rings did not travel. This 'ridge' is slightly lower than the travel of brand-new rings on those pistons, and can cause a mild crash that forces the top rings downward each time the piston rises. This unsettles the new ring and will not let it seal. So, "rehoning" of used cylinders in order to install new rings requires that you hone them enough to remove this 'ridge'. This usually takes 3-5 minutes of honing, stroking down-up-dwon-up in the bore the whole time, with a brand-new hone like the ones shown in your previous post, chucked into an electric drill. When you start to hone, you will see that the hone is not touching the cylinder walls in the area that is just below that top ring's "ridge", and this will become your guide to how long you must hone it to remove that ridge. As you hone it the un-honed area in this zone will become smaller and smaller: stop when the top ring's 'ridge mark' has been honed away. This will usually be about 0.001" of honing on most of the 350F/400F bores that I have done.
But - all this honing is also making more cylinder clearance. In the end, it will come out very close to the worn-out spec of 0.0012"+ clearance, so the new rings will not seal for very long, possibly 8,000-10,000 miles at best. This was/is typical of the "college kid rebuilds" I did so long ago to help my schoolmates ride through their college days.
If you go for a step-bore job, I can recommend the pistons from CrusinImage for a low-cost set, but you may also wish to find some MC brand, Honda brand, or RIK brand of piston rings to go with those pistons, as right now the rings being shipped with the CI pistons are not as good quality as before the pandemic. If you get pistons in 0.5mm oversize, get the same oversize rings. This makes a good rebuild if you cannot find Honda parts.
