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1973 Z1 Maui
- Wookie58
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22 Jul 2022 08:40 - 22 Jul 2022 08:41 #870842
by Wookie58
Replied by Wookie58 on topic 1973 Z1 Maui
Absolutely agree with you, this is why I suggested the pressure check at the switch housing - any restriction or blockage related to the deleted cooler etc should cause the oil pressure to be higher than normal at this point whist there is air flow and signs of oil at the head it is difficult to measure if it is anything like the high flow rated expectedAt this point nothing adds up....
According to all test performed and where oil is observed oil flow is not the problem
1 oil is causing pressure gauge to show pressure at oil transfer elbow
2 oil pressure if not allowed to flow from pump has cause some to have oil filter cover blowing seal or warping ( breaking ) cover at oil pan ( Not reported here )
3 signs of oil to top of block shows flow to head
4 air blown thru head passages shows no restriction
Im at a loss for what is wrong , So start over
Crank motor over to see unrestricted flow with head off to top of block
If poor flow pull transfer elbow off from behind motor to check for plug from oil cooler used priorly or a restriction in the area. This is biggest change you made by deleting the cooler from system
Next pull block and look for restricted oil supply from ports coming off cases and look for silicon in stud bores from prior assembly of motor
If all good revist head issues.
Do cams rotate if installed on head off motor freely or do they bind ??? ( seperate from valve spring tension )
Assume nothing ,,,Check the smallest detail
Use plastigauge to check cam bearing clearance
Good Luck nand let me know
Dave
Last edit: 22 Jul 2022 08:41 by Wookie58.
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- MauiZ1
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23 Jul 2022 13:03 #870910
by MauiZ1
Replied by MauiZ1 on topic 1973 Z1 Maui
As I go through looking at everything, including the books and photos, I have noticed one thing that I’m not sure of. The top cam chain gear idler between the cams looks symmetrical. I’ve seen it installed in my books both ways. I marked mine with an arrow upon initial disassembly. What if it’s backwards? I don’t see how it would cause my problem but worth asking.
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- Scirocco
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23 Jul 2022 15:10 - 23 Jul 2022 15:15 #870913
by Scirocco
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Replied by Scirocco on topic 1973 Z1 Maui
The Top Cam Chain Idler can be used both ways! He is made/build to the center of cam chain with no off set any way.
Only the dis-integration of the cam chain gear rubber damper part can cause an off set.
Only the dis-integration of the cam chain gear rubber damper part can cause an off set.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Last edit: 23 Jul 2022 15:15 by Scirocco.
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23 Jul 2022 15:15 #870915
by MauiZ1
Replied by MauiZ1 on topic 1973 Z1 Maui
I’m going to try a pre-prime setup to fill the upper oil passages before spinning it with the starter.
im waiting for a gauge as well.
im grasping at straws here
im waiting for a gauge as well.
im grasping at straws here
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23 Jul 2022 15:39 #870918
by Wookie58
Replied by Wookie58 on topic 1973 Z1 Maui
Have you removed the bung and checked for a cooler restrictor as mentioned previouslyI’m going to try a pre-prime setup to fill the upper oil passages before spinning it with the starter.
im waiting for a gauge as well.
im grasping at straws here
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- Mikaw
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23 Jul 2022 15:40 #870919
by Mikaw
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.
Replied by Mikaw on topic 1973 Z1 Maui
Need to figure out how to do something like this. Not compression testing, turning the engine with an external source
fb.watch/escvlIBDEK/
fb.watch/escvlIBDEK/
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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23 Jul 2022 15:51 #870920
by MauiZ1
Replied by MauiZ1 on topic 1973 Z1 Maui
Yes, l took out the bung and all is clear
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23 Jul 2022 16:44 #870922
by Wookie58
Replied by Wookie58 on topic 1973 Z1 Maui
Before risking more damage could you make a gasket for the switch housing with no hole on the switch side to block the oil pump, then suspend a container of oil as high as possible above the bike and gravity feed it into the bung hole. Current atmospheric pressure in Hawaii is 14psi. Given that this is a high flow system the container should drain relatively quickly (random I know)
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23 Jul 2022 19:19 #870925
by MauiZ1
Replied by MauiZ1 on topic 1973 Z1 Maui
Kind of what I’m planning.
bucket test of oil pump, for what it’s worth
bucket test of oil pump, for what it’s worth
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23 Jul 2022 19:20 #870926
by MauiZ1
one more try
Replied by MauiZ1 on topic 1973 Z1 Maui
one more try
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24 Jul 2022 01:44 - 24 Jul 2022 01:48 #870931
by Wookie58
Replied by Wookie58 on topic 1973 Z1 Maui
Kind of what I’m planning.
bucket test of oil pump, for what it’s worth
I was thinking more about a flow test through the motor, with a gravity fed supply to the gallery you could loosen each of the four outer head nuts in turn and see how much flow you have coming up to the head (ref Z1015's advise about HD studs)
bucket test of oil pump, for what it’s worth
I was thinking more about a flow test through the motor, with a gravity fed supply to the gallery you could loosen each of the four outer head nuts in turn and see how much flow you have coming up to the head (ref Z1015's advise about HD studs)
- if the flow is poor consider drilling as advised or replace studs with stock
- if the flow is good consider removing the gallery bungs on the head as mentioned previously and inspect the gallery's
Last edit: 24 Jul 2022 01:48 by Wookie58.
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- hardrockminer
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24 Jul 2022 04:00 #870933
by hardrockminer
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.
Replied by hardrockminer on topic 1973 Z1 Maui
I think I mentioned earlier that I once had to tear an engine down completely five times before I found that I had a non standard transmission that was causing the kickshaft to grind on the trans gears. (It was a close ratio transmission option offered by KHI back in the day, but it required removing the kickshaft.) It was frustrating but I had faith that eventually with advice from others I would find the cause. And I did. The payoff for you will be the immense sense of satisfaction when you finally solve this mystery.
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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