i am going to have to say no with no real knowledge on the basis that it would defeat the purpose of the key code. my guess would be it goes by either region that the bike was sold in or plant it was manufactured at or how many were sold that year and it just keeps going up. another idea could be that they make xxxxx amount of locks and it just keeps recycling.
The key code? Like, the little black plastic tag that you get with the bike with a unique numerical identifier on it?
If it were the same for all of the same year then you'd be able to put your key in any 07 bike and start it.
Im going to have to say no.
Unless Im totally misunderstanding the question (which wouldnt surprise me either)