This is the orange replacement part for your Yamaha FJ1200 FJ 1200 regulator. This part is known to burn out in the oem regulator.
It is very easy to replace. Simply unscrew two screws and put the new orange piece inside your improved regulator. It should take seconds to replace the orange non-functional part of your regulator.
You might want to purchase the Yamaha FJ1200 FJ 1200 rectifier.