If your bike has immobilizer, new keys will arrive with chip built into them. Keys need to be paired with ECU. I've seen my dealer pairing my keys with new ECU. Took him 30 seconds for each key. No extra tools or computer needed, just proper procedure of turning ignition on and off while pressing I don't know which button. I don't know the sequence but somebody on this forum might. If not, ask your dealer for help.