First and most important item. Probably also your most expensive.
Good set of metric wrenches & sockets.
I don’t quite have the nerve to tackle the carbs yet, so I can’t speak to that.
Tire changing stand & balancing stand – Paying somebody else $60 to do it gets old after a while. The stand from Harbor Freight can be converted for cars too (probably most of them can), and this might save me a bundle of money down the road. Don’t have it right now though.