1982 Rear indicators are acting up.

I'd like to go in with an all new harness. Thoughts opinions? Also motor is out for starter clutch replacement.

Replacing the entire wiring harness to cure a rear indicator problem is overkill. It may be something as simple as a dirty or corroded bulb holder.

It would be helpful to identify exactly what the problem is and exactly which motorcycle you have. There are some significant differences between the various KZ models.