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1973 Z1 Maui 27 Jun 2022 08:18 #869420

  • MauiZ1
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Still waiting for my cams to come back.
I think the tank and body work are done, have to go get it all soon.

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1973 Z1 Maui 27 Jun 2022 08:27 #869422

  • Wookie58
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Exciting times 
1982 KZ1000 Ltd

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1973 Z1 Maui 27 Jun 2022 13:47 #869435

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I'm sure you've checked those bearings a few times.
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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1973 Z1 Maui 06 Jul 2022 19:38 #869988

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Just learned my cams are finally coming back after polishing. Maybe I’ll finally get this going again. The tank and body stuff are done, I just need to fly over and pick them up. I sure hope this all works out. Now at least I have a pretty good idea of what really was my problem. Learning curve!
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1973 Z1 Maui 07 Jul 2022 05:05 #869995

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Good luck.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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1973 Z1 Maui 18 Jul 2022 14:37 #870570

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This may be the end of my frustrating road with this project.
After the last miserable failure of cam bearings I took it all apart looking for a cause, I even thought I found one.
I looked at oil passages, measured the oil pump, made sure the o ring between the engine case halves was perfect, blew out all the passages, assembled the cams with no valve gear to make sure they spun well, made sure the oil pressure switch had the bleed hole.
put it together yesterday and started it. I cranked it until the oil light went out, about 30 seconds. Started it up, ran excellent for a minute or so and stopped. Cam bearings again.
so now I’m back to trying to find out what is really wrong with this or maybe I should just end my misery and be done with it.
I’ve missed something that must not be very obvious.
I have one more set of cams to use and I believe I can clean this set up.
very, very frustrating, I’m not accustomed to this type of failure.

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1973 Z1 Maui 18 Jul 2022 14:52 #870572

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Is it the same journal that have failed again ? And has the bearing turned as before ?
1982 KZ1000 Ltd

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1973 Z1 Maui 18 Jul 2022 14:55 #870573

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Is it the same journal that have failed again ? And has the bearing turned as before ?

Good Q. Also, is that the same head? You may need to make sure that journal oil supply hole is not plugged
78 KZ650B2A - resto in progress
www.kzrider.com/forum/11-projects/615161...s-1978-kz650-project
Other bikes: 1978 BMW R100/7, 1978 Moto Guzzi T3, 2016 DRZ400s

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1973 Z1 Maui 18 Jul 2022 16:47 #870580

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Same head
they didn’t turn
I’m back to oil delivery because several seized up. I just can’t see where oil delivery would be an issue, unless I’m blind to something.

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1973 Z1 Maui 18 Jul 2022 16:51 #870581

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Well that's depressing!  Whatever it is....it's something no one has experience with.  Small consolation I know.  Did you get oil up into the head?  
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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1973 Z1 Maui 18 Jul 2022 23:01 #870598

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Same head
they didn’t turn
I’m back to oil delivery because several seized up. I just can’t see where oil delivery would be an issue, unless I’m blind to something.

 
Did you drill the cylinder block as recommended by Zed1015 to clearance the heavy duty studs ?
1982 KZ1000 Ltd

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1973 Z1 Maui 19 Jul 2022 00:48 #870602

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Non matching cam caps ?  

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