Very interested in this but cant help thinking your missing out on some essential bits while its all apart.
Your comment above about bearings shows exactly this attitude.
No matter when they were done, if the bike is apart I’d be making sure the races and rollers are thoroughly cleaned, inspected, degreased and repacked with RG2 (THE ONLY grease for MX bikes ;-) )
Same goes headstock(are they old style loose ball on that age?), swingarm, shock and both wheels.
Like what your doing as I love tinkering up the garage but when its done to that degree then I find being extra meticulous pays off dividends in the long run.
EDIT: Writing that as your post was posted. You have taken the time to strip things down and repaint….although not removing nuts, bolts, washers, bungs, rad caps etc means your just polishing a turd.
Getting kind of wound up here over this as its restoration at its worst.