KZ900 - "Z1E" next to VIN # ???

Hey all,

I was working on my kz900 at my in-laws this past weekend and my father-in-law noticed something interesting... "Z1E" was engraved right next to the VIN# (it was somewhere on the engine on the right side...I can't remember exactly where).

Do all '76 kz900's have this or is this an indication that I may have a mixed parts bike (or a different bike all-together)?

I bought it used only a couple months ago with virtually no documentation so I really have no clue what the pedigree is for this bike.

Maybe a dumb question to all you who know these bikes really well, but I am new to the game and just thought I would see if there is maybe more to my bike than I originally thought.

Thanks

Z1E is "Engine" The frame is stamped Z1F for "Frame"

Roger that, that makes sense. I guess I was just a little confused as to why "Z1" would be stamped onto my KZ bike. I thought that perhaps it would indicate that the engine was from an '73-'75 model as opposed to '76.

Does it have the big or small exhaust studs on it, Big ones are 1000's

Look on zedder.com and it will tell you what year the motor is by vin number

The '76 and '77 KZ900's were numbered Z1E and Z1F.

More info here:

www.z1enterprises.com/reference/z1-numbers-guide.aspx