SOHC.co.uk Forums > CB350/400

Oil leak from head.

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McCabe-Thiele (Ted):
Correct me if I'm wrong but a DS genuine head gasket might not fix the issue as it will not have the original asbestos base that is thinner, it's probably illegal to sell an asbestos based gasket unless DS have compensated with larger seal rings or somehow made the gasket the same thickness as the original.

PS I keep on calling them O rings they are more like sleeves shaped.

Bradders:
Thanks for your replies guys. For the time being I’m thinking I’m going to take the exhaust off and get all the old oil off and think about what to do next.

Athame57:
About a year ago my leaky head was cured with DSS parts as part of a wider rebuild, no problems so far is all I can say.

Athame57:
As a matter of interest, do you have a very early CB400F? I gather Honda made some subtle amendments to later models to redress an issue with leaky heads.

Bradders:

--- Quote from: Athame57 on November 06, 2024, 04:00:41 PM ---As a matter of interest, do you have a very early CB400F? I gather Honda made some subtle amendments to later models to redress an issue with leaky heads.

--- End quote ---
Hi Athame57. My bike is an early one , I think 122. It had a top end rebuild in 2019 with a DSS gasket set and had been fine until about 6 months ago when it started leaking.

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