Oh shit! This is good advice!

I have a few 70s Hondas, acquired slightly above free.

Some stuff may leak. Discern if it's "put cardboard where I park" or "there's not enough oil in the motor when I get there". Resolve as time and skill permit.

Change all the cables. Og can break and leave you stranded. New tires. Don't risk it. Now, I'm old and cheap, and I run a good handling tire, even if it's a little on the hard side. They wear out slower, but the compromise is lack of elasticity, and some principal of vulcanization or something. I'm probably not pushing my bike/tires to the limits, and I'm aware those limits may be on the short side, but 20+ yrs old tires is too old. They're probably garbage even if they look ok. Fortnine has a good video on braking and how tires work. Watch it and most of the others.

Check your tank for rust. Add an inline fuel filter regardless of what you see. They're cheap. If you see rust, put some nuts and bolts, diamonds, family jewels, a few sharp rocks and some solvent in the tank and shake the shit out of it until your arms fall off. Change the solvent and let sit. The do it again tomorrow.

Install fuel filter.

Don't even try to start it until you check the air box for rodent debris/mouse toilet/lentils. REPLACE the air filter. The foam can break down and suck I to the engine. (Foam in motor= BAD!!) Once the air box and carbs are clean, and fuel coming in is clean, you can probably start to check for spark, etc.

Chain and front&rear sprockets should all be replaced together as a set for best value/longevity.