Author Topic: Found oil leak  (Read 1371 times)

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Offline uksparky

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Found oil leak
« on: April 28, 2013, 10:57:03 AM »
Well i found my oil leak its coming from the cover on the oil pump..held on with three phillips screws...anyone know where i can get the thin oil seal that fits in the cover
Present bike 1982 900C Custom

Offline mronegear

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Re: Found oil leak
« Reply #1 on: April 28, 2013, 01:27:05 PM »
what bike are you riding?

As to say for the cb 500/550 Four, there is no such a cover-seal or o-ring to get via cmsnl.com
I guess in europe these seals are very rare...

good luck!

Offline uksparky

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Re: Found oil leak
« Reply #2 on: April 28, 2013, 03:53:57 PM »
what bike are you riding?

As to say for the cb 500/550 Four, there is no such a cover-seal or o-ring to get via cmsnl.com
I guess in europe these seals are very rare...

good luck!


Thanks for the partsinfo... cb 550 lt..looks like i am screwed..that small O ring is part of the pump..have to try parts store
Present bike 1982 900C Custom

Offline freeze

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Re: Found oil leak
« Reply #3 on: April 28, 2013, 05:36:02 PM »
Copied from another post... (thanks Bryanj)

"However to help all out I have been doing some research and discovered that whilst Honda do not list the cover "O" ring as a separate part for the 500/550 the correct size is used on other bikes and so for those in need here are the part numbers and sizes:-

91305-426-003 oil pump cover      46x2     one required
91302-377-000 suction and feed   15x2.5  two required
91302-250-010 casing to block     47x3      one required


Best wishes to all and hope that that helps


« Last Edit: January 19, 2013, 09:50:42 AM by bryanj » "


Offline Dave Voss

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Re: Found oil leak
« Reply #4 on: April 28, 2013, 11:06:46 PM »
It's a 46x2mm o-ring, McMaster-Carr sells them in both Buna-N rubber (like the stock o-ring) and Viton, which has a higher temperature rating.  I use the Viton part number 9263K665 that comes in a quantity of 10 for about $8, if you give me your address in a PM, I'll mail one of my extras to you.
-Dave Voss
(past) '78 CB550K4
(past) '75 CB550K1
(now) '95 R1100RSL

Offline trueblue

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Re: Found oil leak
« Reply #5 on: April 29, 2013, 02:04:09 AM »
When I did my 650 I just took all the o-rings into the local bearing shop and got them matched size for size.  Cost me about $2 ;D
1979 CB650Z
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Offline dave500

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Re: Found oil leak
« Reply #6 on: April 29, 2013, 03:05:25 AM »
any time im at the bearing place i get a hand full of o rings we commonly use for about 8 bucks.

Offline mronegear

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Re: Found oil leak
« Reply #7 on: April 29, 2013, 05:00:12 AM »
Copied from another post... (thanks Bryanj)

"However to help all out I have been doing some research and discovered that whilst Honda do not list the cover "O" ring as a separate part for the 500/550 the correct size is used on other bikes and so for those in need here are the part numbers and sizes:-

91305-426-003 oil pump cover      46x2     one required
91302-377-000 suction and feed   15x2.5  two required
91302-250-010 casing to block     47x3      one required


Best wishes to all and hope that that helps


« Last Edit: January 19, 2013, 09:50:42 AM by bryanj » "

thanx for that info, freeze!

Offline uksparky

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Re: Found oil leak
« Reply #8 on: April 29, 2013, 06:24:53 AM »
Thanks to everyone that helped me.. ;D
Present bike 1982 900C Custom

Offline dave500

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Re: Found oil leak
« Reply #9 on: April 29, 2013, 12:52:35 PM »
get two sets.

Offline Duanob

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Re: Found oil leak
« Reply #10 on: April 30, 2013, 10:51:43 AM »
get two sets.

Yes always buyu two sets of o-rings, they are cheap but easily destroyable.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

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