Inconsistent Valve Seats?

Restoring a KZ750E2 and getting ready to reassemble the head after a deep clean and repaint. The engine has done 11k miles and looks good on the inside for the most part.

I've got some Neway cutters so decide to take a light clean up scrape to remove any remnant crud. The exhaust seat width looks good, consistent all the way around, but the intakes are very inconsistent. On the side of the seats near deck surface the seat width is quite a bit thinner than the opposite side. All the intakes look this way to some extent, but some are worse than others.

Has anyone ever seen this before? Do I need to spring for a real valve job to properly repair the seats?

Maybe the seats aren't square in the head? If you have the additional angle cutters the quickest fix would be doing a 3 angle to standardize the seat width.

What do the guides look like?

Guides look fine. Minimal clearance with the valve.

Okay, so spent a little more time on this.

The intake valve seat width was about 1.0 mm on the outside edge of the seat (near the deck surface) and about 1.5 mm on the other side. Didn't have a 60* cutter (Kawasaki calls it a 30) so tried a Suzuki 15 * and low and behold, it cut the seat exactly where needed. Can't believe it. A Christmas gift for sure. Apparently Kawasaki didn't spend a lot of time trying to make the seats uniform. At any rate, the seats are all a uniform width so going to slam the head back together.

I have a couple of these GPz/zx engines but not yet had the heads off.

Is there is a skim marker on the underside of the cylinder head- are you sure it hasn't been skimmed before? (postage stamp size flats on the castings below the exhuast valve ports)

www.moto-wreck.com/Vyrobky-info/KAWASAKI...-GPZ-1100-F.I.-_82_/

Following on from the gpz750 head skimming thread, and discussion about skimming these heads it seems there may be some wide variance in factory tolerances here. There was a thread on just this elsewhere from someone who compared several 750 heads.

Interesting thread, not sure the answer just things I'm thinking about for my own projects.

Tyrell Corp wrote: I have a couple of these GPz/zx engines but not yet had the heads off.

Is there is a skim marker on the underside of the cylinder head- are you sure it hasn't been skimmed before? (postage stamp size flats on the castings below the exhuast valve ports)

www.moto-wreck.com/Vyrobky-info/KAWASAKI...-GPZ-1100-F.I.-_82_/

Following on from the gpz750 head skimming thread, and discussion about skimming these heads it seems there may be some wide variance in factory tolerances here. There was a thread on just this elsewhere from someone who compared several 750 heads.

Interesting thread, not sure the answer just things I'm thinking about for my own projects.

I've got two different 750E heads and both are the same; the valve seats are extremely close to the deck surface. Forget about increasing compression by milling the head.

ok if you google it is there is someone who compared several z750 heads and got widely different results - I did try to link to it but it escapes me finding it right now. This is against my belief in kawaskai precision engineering, might be crap just throwing it in. But also seems unlikely they wouldn't build in at least an extra thickness of at least one skim in case of warranty repair?

The skim markers show whether a head has been skimmed; serious skimming and reprofiling combustion chambers for a big valve conversion also grinds the carb flanges down on the 550 head.

Motors with moderate compression run smooth and happily on low octane juice; the gains in increasing CR alone without other mods are quite limited imo.

You might well be right here, interested in this myself.

Just went to the page, didn't see any pics of the valve seats. I did notice a case half for sale. I'd like to point out the cases are line bored like the heads and have to be sold as a pair. There were some on eBay for sale and I pointed that out to the sellers and got no response or a rude one. That.s just wrong and no one seem to care. Buyer beware!
Steve