Noise could be something as simple as valves needing adjustment. Idle might be low or have a dirty carb rather than need engine work.
More than likely you’re right, but might be a simpler fix.
So at this point I'm torn. After checking for peak voltage at the coil and only getting 5v and 100v min, then at the ICM plug i had .52v with a min of .7 and then at the 5p generator plug I had .75v with 0.7 v min. I'm just barely at the bottom threshold at the generator plug. I'm having a hard time thinking it's a bad wire in the harness but I'm open to ideas... what's your thoughts?
So at this point I have replaced the regulator, ignition control module, coil, spark plug and the stop switch was replaced prior. Where's the cdi located?