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Inner Chamber Leaks under Pressure - 250X

Posted: Thu Apr 23, 2009 4:55 am
by SJW
Hi

When I compress the fork damper piston rod 70% of the way the piston rebounds correctly.

If however if I compress the piston rod 100%, some of the oil is expelled which can be poured out of the overflow holes on the fork damper spring chamber.

Thereafter it will not rebound all the way - about two inches from the top

?? - Honda said I should not compress the fork damper piston rod 100% when testing the bleeding

?? - Not sure if I understand the manual, but it states that one should compress the rod 100% which will result in oil been released and 178cc left. Does this mean that the damper will not rebound 100% (two inches from top)?

Can anyone please advise where I am going wrong

Much appreciated

Stephen

Posted: Thu Apr 23, 2009 7:34 am
by 124
If the inner chamber will not bleed, leaks, or continues to pour out more than the 17mL, then the floating piston seal is bad. Also known as the Inner Chamber Seal.

This would be a good time to take it to someone who has done one. They are out of the realm for average garage tools and abilities.

Posted: Thu Apr 23, 2009 8:00 am
by PaiNLeSS
124's correct, it's more than likely the inner chamber seal. Not a terribly uncommon problem on Showa forks.

Several companies sell them, here is one from MX-Tech...

http://www.mx-tech.com/?id=products&prod=1170

I'm sure you can replace them yourself if you're willing to be very careful

Posted: Thu Apr 23, 2009 9:24 am
by Asmith
They are in-stock at CRF'sONLY.com

And at a much better price too!!

http://www.crfsonly.com/catalog/product ... ts_id/3237

Posted: Thu Apr 23, 2009 11:32 am
by PaiNLeSS
Wow, that is a sweet price!

Know where I'll be getting them in the future. Thanks, ~.