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Fork seals cb450k6 leaking!

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Fork seals cb450k6 leaking!

Postby brewski on Wed May 20, 2009 12:51 am

I installed new fork seals 6mo ago,Iwas advised to use automati transmission fluid,well it eventually leaks out.Any ideas? Brewski.....
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Re: Fork seals cb450k6 leaking!

Postby Red V Four on Wed May 20, 2009 8:24 am

ATF oil, fork oil, whatever oil..........if they leaked it's either down to the seals or the fork stanchions themselves. Are the stanchions pitted? If so, the oil will get into the pits and then leak past the seals, and the pits will also eventually damage the seals.
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Re: Fork seals cb450k6 leaking!

Postby Witchmaster on Wed May 20, 2009 9:10 am

did you use original replacement seals or cheap after market seals?

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Re: Fork seals cb450k6 leaking!

Postby brewski on Wed May 20, 2009 5:55 pm

Used OEM seals,no pitting was noticed!
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Re: Fork seals cb450k6 leaking!

Postby Red V Four on Wed May 20, 2009 9:32 pm

Have you used the correct amount of oil?
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Re: Fork seals cb450k6 leaking!

Postby Witchmaster on Wed May 20, 2009 11:09 pm

Red has a good point if you have over filled the forks then the oil will try to find somewhere to go and could start to leak and possibly damage your nice new seals.

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Re: Fork seals cb450k6 leaking!

Postby Red V Four on Wed May 20, 2009 11:17 pm

Yes, it has been known for people to fill the forks brim-full with oil, then wonder why they seem somewhat solid ! :lol:
There is a specified volume of oil in them, (or on much more recent models, filled up to a certain distance from the fork top).
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Re: Fork seals cb450k6 leaking!

Postby Chimp Boy on Thu May 21, 2009 10:45 am

When forks leak a few months after a rebuild I've often found the cause to be a bend in the stanchion. The seal can cope for a while but the increased side loading gradually causes it to fail. It doesn't take much of a bend for it to happen either.

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Re: Fork seals cb450k6 leaking!

Postby brewski on Sat May 23, 2009 12:58 am

Thanks for your advice. brewski.....
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