Hi.

My third recfifier burnout resulted in having to change a lot of electrical components: CDI box, speedometer/rev-meter, flasher relay, battety, headlight bulb and the rectifier itself.
On the f3 the rectifier is located behind faring without cooling thus getting quite warm.

The original Honda rec does not even have cooling fins as the aftermarked Electrix does.
Even though is gets too hot.
By moving the rectifier to the tray under the seat and joining it with a larger heatzink located beneath, the temperature dropped to a reasonble 42*C measured just after a hard run.
The work took around 3 hours but I will hopefully never need to change the rec again 🙂

 

that is nicely done.
But a hot rectifier points to a lot of power usage.
This might be something to look into.
Also a bad stator can give a lot of issues too.
Personally I would look for the root cause and not fixing a symptones.
I don't know your bike so, it might very well be the best solution.
Good luck