Fiddledeesticks.
As to insurance paying or not: It's a contractual matter between the insurer and the insured. Most insurers require that their insured be a licensed driver. But that has nothing to do with the third party (ie the bike+rider in this case). Whether a third party is licensed or not does not affect the delictual liability of the negligent person, insured or not (the car driver in this case). This is well established in local law, despite many an insurance claims clerk saying otherwise.
By the way, being unlicensed isn't enough to let the insurer off the hook. It depends whether it's materially relevant. An insured knowingly lent his car to an unlicensed driver. The car was hijacked, and the insurer refused to pay. The High Court held that it was irrelevant that the driver was unlicensed, and instructed the insurance company to pay. They did. (This is not applicable to the OP's case; just mentioning it here in passing as additional info).