SOHC.co.uk Forums > CB750
Help! What's caused this?
Bristolbadger:
--- Quote from: K2-K6 on March 31, 2022, 11:48:23 AM ---The sealant/blockage, by deduction, must have been present somewhere between the entrance where the oil filter bolt threads are (post filtration) and through the oil galleries from there onward until reaching the supply up the barrels.
I agree, that you can't be sure without much more extensive inspection.
I don't mind splitting them to work of them, would be more gutted to have it happen again though.
--- End quote ---
Yep I hear what your saying and as much as it'll pain me to spit the cases again at least it'll be thorough and my mind will be at rest when she's up and running again.
It's more about having garage/workshop space to do it in. I've been evicted from the school boiler house that I built her in and really didn't expect to be going into the guts of the engine again... so soon anyway.
What a blast
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Bristolbadger:
--- Quote from: Bryanj on March 31, 2022, 05:36:31 PM ---I have seen that jet blocked by a piece of gasket fallen into the oil feed from cleaning off head or base gasket
--- End quote ---
And no way of knowing until it was too late? Hope it didn't do what mine did
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Bristolbadger:
Hi folks, so I'm making some progress on the repairs and have a few questions...
I've got a head gasket but it's not the graphite type like the previous one I used... it was from a closing down, old school bike shop/engineers and seems like it's more fiberous (composite?) and than the previous NE one that came in a set for the whole bike.
So how to proceed with it when I'm back at that stage... oil it, use copper spray seal or what?
Also another pertinent question that could be a contributing factor to my problem; I'm running a custom oil tank with the original hose unions at the engine end but connected with ID: 14.3mm hose. Do you think this will adversely affect the flow/pressure? Anyone know the original hose ID?
Cheers fer now
Nurse Julie:
If that rust on the fire ring is more than superficial, don't use that gasket.
Trigger:
--- Quote from: Bristolbadger on April 04, 2022, 02:38:13 PM ---Hi folks, so I'm making some progress on the repairs and have a few questions...
I've got a head gasket but it's not the graphite type like the previous one I used... it was from a closing down, old school bike shop/engineers and seems like it's more fiberous (composite?) and than the previous NE one that came in a set for the whole bike.
So how to proceed with it when I'm back at that stage... oil it, use copper spray seal or what?
Also another pertinent question that could be a contributing factor to my problem; I'm running a custom oil tank with the original hose unions at the engine end but connected with ID: 14.3mm hose. Do you think this will adversely affect the flow/pressure? Anyone know the original hose ID?
Cheers fer now
--- End quote ---
That gasket looks to be K1/K2. I thought you had a K5 which should have the dowel pins with a rubber seal around them. Can you post a picture of the top of your barrels to confirm ;)
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