TOPIC:

Does this key number go with the vin number of a bike? If so does anyone here have such bike and need this?

Not specific to VIN....just goes with all other locks on the bike eg.  ignition, seat lock helmet holder

FYI - Those type of keys go in aftermarket switch barrels, it might say Kawasaki on it but that Z number is what is stamped on the barrel of Emgo switches.

Injected wrote:

FYI - Those type of keys go in aftermarket switch barrels, it might say Kawasaki on it but that Z number is what is stamped on the barrel of Emgo switches.

I believe that's an original Kawasaki key.  My '79 Kz650 came with key number Z59xx from the factory.  I don't think an Emgo key would say "Kawasaki" on it.

Oh, and no, the key numbers have no relation to the VIN number.  I think the key number is randomized at the factory. 
There really aren't that many unique key numbers.  For example, the 1978 Z1-R only has 45 different key numbers, and they made 17k units.

Yes, later Kaw, I had 2 - 79-80 KZ1000 E1-E2 Shaft drives I stripped few years ago.
They had that 5 digit with a Z? Or something like yours.

Marty in Buffalo