(I moved this to a new thread since it's a different problem.)
FI stands for fuel injection. That's the computer that runs the engine, also known as the engine control module (ECM), and everything behind it.
The first thing to do is disconnect everything on the affected fuse: coil primaries, fuel pump, main stop relay and ECM. The ECM is a flat, rectangular module with two connectors on it in the tail behind the passenger seat held in place by a thick rubber retainer. ABS bikes will have two modules, the other being the ABS computer and having three connectors. There's no need to disconnect that unless you need to get it out of the way.
Once everything's disconnected, turn off the ignition and engine stop switch. Turn the ignition switch on. Turn the engine stop switch to on. Turn both switches off. (This is "the exercise" I'll refer to below). If the fuse blows when you turn either switch on, you have a fault in the part of the wiring harness that supplies everything else.
Then start reconnecting things one at a time, repeating the exercise and checking the fuse after each new connection. Do them in this order:
- Left coil primary supply wire (Black/White)
- Right coil primary supply wire (Black/White)
- ECM
- Fuel pump
- Left coil primary drain wire (Yellow/Blue)
- Right coil primary drain wire (Blue/Yellow)
Whichever of the reconnections blows the fuse will help narrow it down to a faulty component or section of the wiring harness.
The bank angle sensor is on a different circuit and would be blowing the C fuse (D on an ABS bike) if the fault were there.
HTH.
--Mark