Right, got my engine, ZX12, but I do not know its age, anyone got any information that might help?

the first few digits of the engine number are ZXT20AE.... if this helps

Cheers

it will help anyone who has the haynes manual for the bike, mine only covers zx9s but it would age a zx9 from that info.

Try Hellfire - he is rebuilding his with a ZX12 and I'm sure he will know.

I had the same problem, phoned Kawasaki bu they could not help.
I compared the different diagrams of the K2 and K3 and found it.