SOHC.co.uk Forums > CB350/400

400/4 Oil Pump Oil Leak

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THUNDERDOWNUNDER:
Anyone think it could be O ring leak  as it looks like coming from bottom Big bolt and are they freely available from Honda ? Thanks folks !

mike the bike:
Love the pic.
If you have access to compressed air,  connect the air to the breather pipe at the top of the engine.  This will make the oil piss out rapidly, making it obvious. Done it a few times.

THUNDERDOWNUNDER:
Thanks will give that a go at the weekend . It’s not a major problem at the moment but have to keep the side cover off Or it gets everything covered in oil . It’s. 75 model and it’s been rebuilt by someone before I got it .

billywingnut:
there are two O rings on the oil pump Spares are available from DS

Nurse Julie:
I sell a complete overhaul kit for the CB400/4 oil pump on eBay. 8 O rings are needed.

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