I Have an 929 RRY engine. I can't see the bank angle sensor anywhere so I guess I gon't have it.

Can I live without it
Do I need to modify the loom to ensure the engine runs without it.

Cheers

It won't be banking any more if it's fitted in a car. It's only there for if the bike falls over when it's running so it shouldn't matter anyway.

You need to study the wiring loom to tell you as to whether the switch/relay is normally open or closed. I guess as normally closed this way if the bike goes down or if the switch/relay is missing the engine cuts. If this is the case, then closing the circuit by joining two wires (if it's two) should suffice. Course not knowing this part of the Fireblade circuitry I wouldn't conclusively know... so usual disclaimers apply!