The ignition can be changed any day when engine is in. If engine is out, there is a reason for it, right? Or only repainted the frame?
Open valve cover and inspect. If it has leaked oil, check the leak and replace gaskets.
Long time used might need new chains inside if rattling.
If it runs fine, no leak.... maybe a paint tune up only. I use rattle can spray that work fine without need of baking it in an oven in over 100C, maybe closer to 200C.
Ignitions have different users.
Racers that want the best performance with need of tuning the advance curves. Throttle sensor reading the throttle lift connected to an ign module. The advance might not need to be advanced with increasing rpm's only, maybe a little bit retarded at a certain rpm later on too.
or people that like the old tech stuff that can be a vital part of the bikes heart.
or others that do not have time or have got the feeling for how the old points should be set and maintained.
or combo between old tech and new.... Hondaman's ign module.
Another thing is trust, if you have plans to take bike on a long ride and need to trust the electrical system that has to cope with heat, cold and maybe water.
There is no right or wrong (except for not adjusted ignition), follow what your need tells you and maybe your heart and eventual love for the bike from the old days with the old survived tech, still working
Many restores nowadays are restomods where new tech is implemented in the old vehicle. Like old US muscle cars, replacing an old fuel drinking V8 with a new modern V8 with much more power, cleaner and leaner + replacing bad drum brakes with discs + new suspension.
Up to the owner.
Fun to discuss though!
