Author Topic: 400/4 Oil Pump Oil Leak  (Read 686 times)

Offline THUNDERDOWNUNDER

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400/4 Oil Pump Oil Leak
« on: June 25, 2019, 09:53:33 AM »
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 !

Offline mike the bike

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Re: 400/4 Oil Pump Oil Leak
« Reply #1 on: June 25, 2019, 11:06:45 AM »
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.
Where's that 10mm socket got to?

Offline THUNDERDOWNUNDER

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Re: 400/4 Oil Pump Oil Leak
« Reply #2 on: June 25, 2019, 11:21:38 AM »
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 .

Offline billywingnut

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Re: 400/4 Oil Pump Oil Leak
« Reply #3 on: June 25, 2019, 08:58:59 PM »
there are two O rings on the oil pump Spares are available from DS

Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: 400/4 Oil Pump Oil Leak
« Reply #4 on: June 25, 2019, 09:39:16 PM »
I sell a complete overhaul kit for the CB400/4 oil pump on eBay. 8 O rings are needed.

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LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline THUNDERDOWNUNDER

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Re: 400/4 Oil Pump Oil Leak
« Reply #5 on: June 26, 2019, 07:51:37 AM »
Do you post to Oz ?

Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: 400/4 Oil Pump Oil Leak
« Reply #6 on: June 26, 2019, 08:58:18 AM »
Do you post to Oz ?
Yes, I can send to Oz. I will PM you.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

 

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