Fork swap

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my79650
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Re: Fork swap

Postby my79650 » Tue May 22, 2012 8:37 am

I used 6oz. of fork oil. No air assist; a plain-jane 79 cb650....tubes looked good and sliders too. When i did the install i put the 8-notch side down in both forks as per the photo i attached here. I'll drain some fluid out of both forks and run it to work tonite and post results Wednesday. I did dip them in oil before i drove them into the tubes....just at a loss...other than maybe too much fluid; can't seem to figure it out. Checked my other set that was leaking and they had the same type of seal installed that took into leaking after 1 year...

onepieceatatime
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Re: Fork swap

Postby onepieceatatime » Tue May 22, 2012 8:47 am

Image
Folsoml wrote: Good judgement comes from experience. Experience comes from bad judgement. :lol:


1977 CB750K
1977 CB750K
1978 CB400A
1980 CB650C
1980 CB650
1982 CB900F
1982 CM450A
1997 GL1500SE

my79650
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Re: Fork swap

Postby my79650 » Wed May 23, 2012 2:17 am

I drained out some fluid; sidestand method: pull drain bolt and count to 2 then plug hole; did it for both forks. Ride was a little better; still leaks. I have to check the fork tubes again for any scratches.....any thing else to look for? No cash right now for another set of forks; even used ones have no guarantee on seals.

my79650
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Re: Fork swap

Postby my79650 » Thu May 24, 2012 10:51 am

Pulled the forks apart that the shop did for me yesterday; one had the seal in crooked; the other was also; just not as bad. So i did gently pried out the seals and cleaned them. Then i was very generous with axle grease on the inside of the slider and on the seal. I filled with 5oz. of transmission fluid(not gonna wast good fork oil if they leak again); i also smeared grease on the dust cap as well. Did a squash test for a few minutes to get the fluid moving. Just have to install and do a road test to know for certain. The seals in these forks were the same type as i bought when i started this thread. A gouge in one fork tube was a little deep where the seal sets; not sure if i made it or the shop, other fork has one further down.
Attachments
leaking forks 003.jpg
down enuff for the locking clip
leaking forks 003.jpg (12.83 KiB) Viewed 7972 times
leaking forks 004.jpg
when i pulled the dust cover off
leaking forks 004.jpg (12.77 KiB) Viewed 7972 times
leaking forks 001.jpg
shiny spot
leaking forks 001.jpg (13 KiB) Viewed 7972 times

my79650
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Re: Fork swap

Postby my79650 » Fri May 25, 2012 8:57 am

Was into the local Honda shop and they had on hand a set of the OE fork seals, got them for $22; numbers on pkg:01255-KBH-003....these go in the runner's forks; after i try out the set from the parts bike again after the minor adjustments.

my79650
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Re: Fork swap

Postby my79650 » Mon May 28, 2012 1:41 am

I installed the Honda seals in the good forks; i "borrowed" some Ultratrak Hydraulic/Transmission fluid from work that we use in the payloaders, no weight markings on the barrel. Anyhow after running to work and back 110kms i got no more leaks. I just have to change the fluid back to the 10w fork oil as the payloader fluid is a little rough on the road then i'm good to go! Wasn't going to waste good fork oil if they started leaking again.

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Volker_P
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Re: Fork swap

Postby Volker_P » Mon May 28, 2012 6:07 am

Good to know which seals are no buy.
Although you found it out the hard way.
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forum links to common technical issues

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my79650
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Re: Fork swap

Postby my79650 » Mon May 28, 2012 9:42 am

That's true; but there may be other after market seals out there that are good; i will stay clear of the K & S brand.

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Volker_P
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Re: Fork swap

Postby Volker_P » Mon May 28, 2012 10:32 am

Is the stock seal the same construction with two circular springs or is it build up completely different?
Did you see a noticeable lip there?
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum

my79650
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Re: Fork swap

Postby my79650 » Tue May 29, 2012 2:18 am

The OE seal had a noticeable lip and circular spring on both sides. The other ones had no lip but the two springs as the box had a listing of over 100 machines that they would work on.

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Volker_P
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Re: Fork swap

Postby Volker_P » Tue May 29, 2012 2:39 am

my79650 wrote:The other ones had no lip ...
Guess that's the problem. Missed it on the pictures, too.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum

my79650
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Re: Fork swap

Postby my79650 » Wed May 30, 2012 2:19 am

True; since it was 1st time doing fork seals myself i thought the other brand was properly made; so much for that.

my79650
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Re: Fork swap

Postby my79650 » Fri Jun 28, 2013 8:54 am

Been awhile since i did this replacement; but now the right fork seal is leaking again after a year. Noticed it when i had the bike for a spin before i pulled the carbs for cleaning. On the wait list for now; carb problems priority for now.

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Volker_P
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Re: Fork swap

Postby Volker_P » Tue Jul 02, 2013 1:39 am

Sounds like a quite poor durability. :?
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum

my79650
Posts: 643
Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Fork swap

Postby my79650 » Tue Jul 02, 2013 2:58 am

I lucked out and got genuine Honda seals when i did this last. The right fork could have a scratch on it as well. I got 1 straight tuble left, other is bent. Since its not getting fluid on the brake rotor i'll just top it up for now.


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