what year? 2 stroke or 4 stroke?
Wouldn't be coils as I doubt they would all go out on one side
at the same time and these suzuki coils don't usually go bad.
If you replaced the ecu/power pack then it is probably under
the flywheel, such as a stator or pick up coil, depending on year and model.
Give me the year and model and I'll try to help you.

Rick