TOPIC:

Here's a 77 motor. Notice less ribs on the front of the cases.

With the age of these motors and mods being so commonly done, it's never safe to assume anything. Cases are easy to spot the differences but what's inside you can't be sure of unless you count either the crank teet [difficult] or the camsprocket teet[easy].

I have MKII, KZ and J cases all sitting in the attic at the shop. I also have KZ, J and late model GPz11 heads. I'm going to get a bunch more photos and post them on my site so it's easier for guys to figure out what they have.

MKII rear view. Trans cover, bottom corner & the rib behind the oil fill tower extends on down to the top of the engine case. KZ cases, the rib on the oil tower is shorter it stops before the top of the cases.

Trans cover & case shape differences. Notice the lower right corner of the trans cover. Curved on MKII.

Also if you have the trans cover off the motor, the MKII cases have 2 boss locations where the shift shaft can be installed. One for Shaft Drive, the other for Chain Drive.

OK, so that we're all clear, this reinforcing rib:

Helps identify a MKII case?

porchev914 wrote:

OK, so that we're all clear, this reinforcing rib:

Helps identify a MKII case?

But see how yours doesn't go all the way down on the cases. It's shorter than the MKII rib.

And this curve here Larry?

larrycavan wrote:

porchev914 wrote:

OK, so that we're all clear, this reinforcing rib:

Helps identify a MKII case?

But see how yours doesn't go all the way down on the cases. It's shorter than the MKII rib.

Thank you for the clarification for those of us less experienced in these things Larry

Here's the 2 rib differences on the oil fill tower.

BTW....You're engine cases are looking pretty darn good!

OK Larry, I finally understand what I'm looking at Thank you for noticing, my cases look almost as good as yours! You'll get a better look once I send you my head

sorry for the late reply guys. the engine VIN is KZT00AE-091614 the frame VIN is KZT00A-042004. The bike is rough but it runs.

porchev914 wrote:

And this curve here Larry?

Sorry . i dont get this 1? this is a kz. but the mk11 looks like it has this curve as well?