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Z1000 cylinder head
Posted: Mon Nov 02, 2009 8:37 pm
Author: ZGAZ
two of my shims are down to size 200 which I believe is the "end of the line" for future adjustment. Also the head has some major fin damage. So I just wondered if anybody has a Z1000 A1 or A2 cylinder head for sale.
Posted: Mon Nov 02, 2009 8:59 pm
Author: Pigford
You could safely get a "whisker" taken off the valve stem
"The Devil you know" and all that, another head could be just as bad/worse
Fins can be welded up or built up again
Posted: Mon Nov 02, 2009 9:16 pm
Author: hillbilly
which valves,as the valve in a toyota 4.2 deisel land cruiser is the same size as one in these engines,the stems are longer,therefore you can make them the right size,i also have a head here,but its an import one with the holes going down into exhaust valves.i have the cam cover to go with it.if its any good to you.
Posted: Tue Nov 03, 2009 7:51 pm
Author: Ginger Bear
ZGAZ,
I have a head, came from a Z1000ST, complete with valves, shims & cams. I will be looking for £150 delivered by UPS. If you're interested I will check the sizes of the shims already fitted, should give you some idea of the life left in it.
Cheers GB
Posted: Wed Nov 04, 2009 8:40 am
Author: ZGAZ
Thanks for your offers/advice. I think I will follow Pigford's suggestion & take the vavles out to check whether they can be skimmed. In the Clymer manual it says that the valve stub end can be skimmed up to 4.2mm, so hopefully I can get this done. I'll post the results! Cheers
Posted: Wed Nov 04, 2009 9:29 am
Author: Ginger Bear
ZGAZ, Grinding down the valves is possible, I have done it myself, but 4.2mm seems a lot, are you sure it's not 0.42mm
Posted: Wed Nov 04, 2009 12:36 pm
Author: ZGAZ
Hi GB I think what the Clymer manual is saying is that top part of the valve stem (from the collet groove to the top) must not be ground below 4.2mm. I have just taken out the first valve & that part of the valve stem measures approx 5mm. Therefore in theory I suppose I could have up to 0.8mm ground off that one. As you say taking say 0.4mm or even a bit less sounds about right. Cheers Gaz
Posted: Wed Nov 04, 2009 12:58 pm
Author: Ginger Bear
Don't know if you're aware ZGAZ, but I believe the club operate a shim exchange service.
Posted: Wed Nov 04, 2009 7:26 pm
Author: Steve Cooke
The installed valve height should be within the range of 37.17 - 38.06mm if It's more than that up to a maximum of 38.37mm you can take up to a maximum of 0.3mm from the stem, there should be a minimum of 4.2mm left above the groove. The next move after that would be oversize valves.
The installed valve height should be measured from the top of stem to the cylinder head surface without the spring seat being in place.