When I turn the key the bike won't turn on, no lights, nothing...

Fuses & battery are good also checked the wiring from the ignition leading up to the battery which seems fine.

Any ideas on what could be causing this?

If nothing is working, then the problem must be early in the circuit. If not the battery or fuses, then most likely the ignition switch.
The fuse box is after the ignition, so if power is getting to the fuse box, it's not the ignition. Possibly a connector after the box.
You'll have to get a multimeter and circuit diagram and check what wires have power.

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You might check the fuse in the starter solenoid.