As said above if you loose the red key, and the 2 black ones, you'll need a new ECU, new igintion barrell, new seat lock and the whole thing will cost A LOT of money.

Also if you try to flog a bike without the red/black keys only a breaker's yard will buy it off you for spares and give you little for it. No one will want to buy as it will look well dodgy.