76kz900 cases 78kz1000top end

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21 Apr 2007 19:13 #132626 by tandrws14
76kz900 cases 78kz1000top end was created by tandrws14
need help!!! I have a 76 kz900 w/original motor needs top end, but I want to know is there any extra work involved with putting complete top end from my 78kz1000.

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  • wireman
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21 Apr 2007 20:00 #132632 by wireman
Replied by wireman on topic 76kz900 cases 78kz1000top end
ya need to split the cases and open the bores in top cases up a little bit to clear bigger sleeves;)

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21 Apr 2007 20:58 #132648 by tandrws14
Replied by tandrws14 on topic 76kz900 cases 78kz1000top end
thanks I was told that I could just take my head,jugs and pistons off the 900 and swap for the 1000 parts with no modifications.

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22 Apr 2007 15:19 #132814 by Sandy
Replied by Sandy on topic 76kz900 cases 78kz1000top end
wireman wrote:

ya need to split the cases and open the bores in top cases up a little bit to clear bigger sleeves;)


I don't think You have to...do You?
I thought the 900 cases(same era) were the same size as the 1000...:huh: ...
1977 KZ1000 A-1

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  • wireman
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22 Apr 2007 15:35 #132820 by wireman
Replied by wireman on topic 76kz900 cases 78kz1000top end
might be really close,but im gonna say it needs a little clearancing and i aint no fan of metal filings in crank bearings!:Pmax size on 900 sleeves is 1015 and that leaves very little meat,max size on a 1000 sleeve is 1105 so they are definately a little bigger;)

Post edited by: wireman, at: 2007/04/22 18:37

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22 Apr 2007 22:55 #132959 by Sandy
Replied by Sandy on topic 76kz900 cases 78kz1000top end
Just checked with the cross-ref program.
Here's what it lists for the cases:P ...


439
1977 KZ1000 A-1
Attachments:

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23 Apr 2007 04:14 #132983 by StreetfighterKz
Replied by StreetfighterKz on topic 76kz900 cases 78kz1000top end
Sandy,

Is that part # a superceded part? If so they could just used updated cases for the 1000's and just back dated their fitment chart.

Later, Doug
1978 z1000 Streetfighter
1976 z900 Stripfighter (work in progress)
1983 Gpz750 Resto-Mod
1989 Vmax

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23 Apr 2007 06:33 #133001 by Mcdroid
Replied by Mcdroid on topic 76kz900 cases 78kz1000top end
Both 14001-5022 and 14001-5025 (both #'s listed for the cases) are crosslisted for all sorts of air-cooled 1000's and 900's including the KZ900A4. However, my KZ1000A1 jugs do not fit in my Z1A cases...it will take some machine work.
Michael
Victoria, Texas

1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A

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23 Apr 2007 07:49 #133019 by Sandy
Replied by Sandy on topic 76kz900 cases 78kz1000top end
StreetfighterKz wrote:

Sandy,

Is that part # a superceded part? If so they could just used updated cases for the 1000's and just back dated their fitment chart.

Later, Doug


I have no idea,Doug.
I took the part # from the Kawi site,and entered it into the Zedder cross ref program,and that's what it came up with,Bud.
I have a 900 engine with the jugs off.I believe the engine to be an earlier 900(74),so if Anyone has a 1000 case with the jugs off,We could do a measurement comparison...:whistle: ...
1977 KZ1000 A-1

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23 Apr 2007 07:58 #133022 by 77KZ650
Replied by 77KZ650 on topic 76kz900 cases 78kz1000top end
and for thr record, you dont have to have them machined/bored. you can do it youself with a dremmel. just make it big enough for the cylinders to slide down all the way. i did the same thing fitting a 750 block and sleeves to my 650 cases
07 MDP Rookie of the Year
01 ZX-12R street/drag bike. 8.97 @155.7 pump gas, dot tires, no bars, no power adders. top speed in the 1/4: 161MPH

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23 Apr 2007 08:08 #133027 by Mcdroid
Replied by Mcdroid on topic 76kz900 cases 78kz1000top end
Sandy wrote:

I have a 900 engine with the jugs off.I believe the engine to be an earlier 900(74),so if Anyone has a 1000 case with the jugs off,We could do a measurement comparison...:whistle: ...


This bothers me too...(well, not really :) ) and as soon as I pull the pistons off the rods in my 1000 cases, I'm going to measure both my 1000 and Z1A cases and post the differences.
Michael
Victoria, Texas

1982 GPz750
1977 KZ1000A
1978 KZ1000A
1982 GPz1100
1975 Z2A

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23 Apr 2007 08:24 #133035 by Sandy
Replied by Sandy on topic 76kz900 cases 78kz1000top end
Good call,Bud.
I'll measure the cases on the 74 900 and post what I find too.B)

What year is YOUR 900,Mcdroid...just so We know?...

Post edited by: Sandy, at: 2007/04/23 11:26
1977 KZ1000 A-1

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