Also working on my son's future bike, '94 Yamaha XT350. Since it was an unknown quantity I disassembled the YZ250 forks that the PO put on - a nice upgrade. I always like to know what's going on in suspension and brakes. The seals are holding oil and look new and the fluid was perfectly clean, but the bump stop disintegrated on removal, so I will replace and put the right level of oil in there, and call it good. It also has a leak on the crank seal under the magneto, but it's an easy and cheap job (he says).
The Honda CB750 is getting new APE cylinder studs, as the originals are a weakness leading to what was a very oily top end. I have quality gaskets, and have lapped the valves - for a 31K bike the journals, valves/seats and overall health of the engine is really good. I painted the frame with appliance enamel and had the rest of the hard parts powder coated. It's going to be a sweet bike, just have to decide on color - son thinks the Candy Bacchus Olive is classy and less common than the Flake Sunrise Orange. Either one will be tricky for me to do myself with the decals etc. I am waiting on that decision till the rest is up to snuff.
Can I call you "daddy"?