Kz1000 bottom end and a kz900 head

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05 May 2013 22:39 #585867 by lttletodd
Kz1000 bottom end and a kz900 head was created by lttletodd
Ok guys heres my issue. I have a kz1000 bottom end pistons and cylinders. But i have a kz900 head. Will the exhaust collars off a 1000kz1000 work and is there a difference between the years? Im putting 8mm studs in it.
Oh god... why are there extra parts left over....

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05 May 2013 22:44 #585869 by wireman
Replied by wireman on topic Kz1000 bottom end and a kz900 head
As long as its a 77-78 bottem end it will drop right on,if its a 79-80 bottem end youll need to use the cam sprockets off the 1000 camshafts depending on what crankshaft it has. :)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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05 May 2013 23:28 #585881 by MFolks
Replied by MFolks on topic Kz1000 bottom end and a kz900 head
The Z1 and Kz900/early Kz1000 had M6 X 1 studs for the exhaust system. On the "J" engines, Kawasaki went to M8 X 1.25 studs.
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05 May 2013 23:36 #585885 by Dr. Gamma
Replied by Dr. Gamma on topic Kz1000 bottom end and a kz900 head

MFolks wrote: The Z1 and Kz900/early Kz1000 had M6 X 1 studs for the exhaust system. On the "J" engines, Kawasaki went to M8 X 1.25 studs.


The 1977 KZ1000A1, and the KZ1000B1 both had 8mm exhaust studs. Only the Z1/KZ900 heads had the little 6mm exhaust studs.

Thats the way everybody spots a 900 head from a 1000 head.
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1976 KH400 Production Road Racer.
1979 Kz1000 MK. II Old AMA/WERA Superbike.
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06 May 2013 00:22 - 06 May 2013 00:28 #585896 by wireman
Replied by wireman on topic Kz1000 bottom end and a kz900 head
you can use the the newer collars on the smaller studs in a pinch with some flat washers :)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.
Last edit: 06 May 2013 00:28 by wireman.

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06 May 2013 00:30 #585898 by lttletodd
Replied by lttletodd on topic Kz1000 bottom end and a kz900 head
I appreciate the info everyone! She's been a very long project. And she's almost done. Hopefully should be up and running by next weekend!
Oh god... why are there extra parts left over....

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06 May 2013 00:31 #585899 by lttletodd
Replied by lttletodd on topic Kz1000 bottom end and a kz900 head
What dimensions are different between the newer style the older style collars?
Oh god... why are there extra parts left over....

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06 May 2013 01:39 #585906 by wireman
Replied by wireman on topic Kz1000 bottom end and a kz900 head
The collars are physically the same 73-80 900/1000,only difference being 8mm holes starting on 77 kz1000 versus 6mm for 73-75 z1 900 and 76 kz900 and im guessing the early 77 900s used 6mm studs also. :)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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06 May 2013 07:17 #585930 by LarryC
Replied by LarryC on topic Kz1000 bottom end and a kz900 head
J model collars will fit and look a lot nicer IMO.
Larry C.

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