[sadlyno]

This is a great topic. From my experience:

Fuel system:
Keep the original carbs, clean them up with new seals, buy new slide diaphragms if you can. Also replace the rubber between the carbs and the engine and between the carbs and the air box.

Make sure your gas tank is rust and debris free, if not clean it out with distilled vinegar or other proven solution. You can also seal the tank if you would like. Always run an inline fuel filter and ethanol free gas if possible.

Ignition system: IMO, keep it as oem as possible. The points and condensers made 54 years ago still out perform any after market parts made today. If they need replacing try to find NOS parts. Take care to grease you points cam and check your points gap every oil change.

Misc:
If you want to eliminate battery maintenance look into getting a lithium ion battery, they are pricey but worth it imo. You may want to add adjusting the valve clearance and cam chain tension to your list, it's not a hard job but important!

If your really want to go the extra mile you can clean up and grease the swing arm pivot, that is very often overlooked.

Hope this helps, -Kyle