[Aikidoka]

Tune the carb and then adjust the timing or reverse? Or no difference at all?

 

[jerry 1 a b]

I'd set the initial timing to factory specs, then tune the carb. Then after you have done that, you can advance the timing to your delight.

 

[Traveler]

You can chase them back and forth all day, one will affect the other slightly.
Doesn't matter which you do first, just check them both when you think your done.