Author Topic: Cb400t oil leak  (Read 850 times)

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Offline westhewelder

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Cb400t oil leak
« on: July 11, 2021, 03:13:49 PM »
 Hey guys haven't been on this forum in years it feels like, got a little cb400t 1979 twin in the shop helping a friend fix it up and having a bit of an issue with an oil leak on the front of the motor. I did the baby powder leak test to give you guys a better look but there's a machined channel that runs in between the left cylinder and the cam chain valley and it would seem oil us leaking past somehow and squirting out. I followed all the manual torque values cleaned everything and replaced the gaskets for the top end but still have the leak.

In fact the leak is actually worse now that the casings have been cleaned. I've ran it for about 15 minutes to observe and inspect and will be going back to retorque and see if that helps with anything.

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2011 Kawasaki Vulcan 2011
1969 Honda cb750 (project)

Offline westhewelder

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Re: Cb400t oil leak
« Reply #1 on: July 11, 2021, 03:14:26 PM »
Sorry here's the picture

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2011 Kawasaki Vulcan 2011
1969 Honda cb750 (project)

Offline MauiK3

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Re: Cb400t oil leak
« Reply #2 on: July 12, 2021, 08:44:19 AM »
I'm not familiar with that engine but there may be an oil passage there. There would be a dowel and an o ring perhaps. You will need to remove the top end again to see why it leaks there.
1973 CB 750 K3
10/72 build Z1 Kawasaki