Engine Cases

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10 Sep 2013 14:28 #605849 by Vranasaurus
Engine Cases was created by Vranasaurus
Can you swap out bottom halves? I damaged the lower engine case on my Z1. I have another case but want to know if there are any issues with just replacing the lower half?

Also is it possible to split the case without removing the engine? I think the answer is no but just wanted to ask.

Thanks
1984 ZN1100

1975 Z1B

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10 Sep 2013 14:34 #605850 by Nebr_Rex
Replied by Nebr_Rex on topic Engine Cases
They are machined as a unit.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected

www.dotheton.com/forum/index.php?topic=39120.0


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10 Sep 2013 15:30 #605855 by floivanus
Replied by floivanus on topic Engine Cases
Machined as one, the crank bores and things of that nature would be out of alignment.

Yes they get sold on ebay in halves, no i wouldnt even think about it. What damage did you do to your cases?
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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10 Sep 2013 15:32 #605856 by Vranasaurus
Replied by Vranasaurus on topic Engine Cases
Totally destroyed a bolt hole for the outer sprocket cover. IE I put a hole in the case. Yes I know I'm an idiot.
1984 ZN1100

1975 Z1B

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10 Sep 2013 16:52 #605870 by floivanus
Replied by floivanus on topic Engine Cases
Post up a picture if you can, so we can see what we think and rib ya for messing it up
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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10 Sep 2013 17:44 #605878 by Street Fighter LTD
Replied by Street Fighter LTD on topic Engine Cases
Point 1 Don't use a mismatched set of cases

Point 2 Yes the motor needs to be removed from the frame to pull the bottom case off

Point 3 Pictures would be nice but if broken you may want to reach Joe Hooper at Pitstop who advertises on this site. He claims to be able to fix all sins. He does nice work and has good pricing when I did business with him

Good Luck
Dave

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn

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10 Sep 2013 20:35 #605897 by Vranasaurus
Replied by Vranasaurus on topic Engine Cases
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1984 ZN1100

1975 Z1B

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10 Sep 2013 20:43 #605899 by floivanus
Replied by floivanus on topic Engine Cases
Im sure a competant welder could fix that but with the location it is in you are stripping the motor down and taking that case in bare.

Might cost a bit to get done though.
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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10 Sep 2013 20:52 #605900 by Powerstroke_fan
Replied by Powerstroke_fan on topic Engine Cases
If you gotta split the cases to get it welded i would just use different cases.
1980 kz1000B4 LTD- 1327cc 9-1 comp
Ported J model head
Psp-3x cams
RS 36s
Welded MK11 crank
Back-cut MK11 trans
MTC 2 stage lock up
Stretched 4-6 over running Hayabusa rear rim with 190 rear tire
Complete frame brace kit installed
And Much Much more- SOLD

2014- ZX14R all stock for now

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10 Sep 2013 21:04 #605901 by Vranasaurus
Replied by Vranasaurus on topic Engine Cases
I dont have a completely good set of cases just a good bottom end. If I go to use new cases I have to tear the top end apart. I can split the cases without tearing the top end apart correct?
1984 ZN1100

1975 Z1B

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10 Sep 2013 21:09 #605902 by etbike3135
Replied by etbike3135 on topic Engine Cases
Dont use different cases! You need those matching numbers for a correct Z1. Yes, case half swaping has been done. I have done it myself. Most of the factory tolerances allow you to do this with out a problem. One of the biggest things that has kept me from swaping halfs is a mis match length for the outside covers (ignition, clutch, and dyno.) Sometimes they are about .015-.02 off and thats too much for a gasket to seal.
If you case is not pouring oil out right now from the damage it can be welded.
1973 Kawasaki Z1
18 years in dragbikes

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10 Sep 2013 22:17 #605918 by koolaid_kid
Replied by koolaid_kid on topic Engine Cases
Yes, you can split the cases without removing the top end. I did it last summer when I replaced the transmission on my GPz.
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.

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