Author Topic: dismantling shocks  (Read 2447 times)

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Offline thelowmax

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dismantling shocks
« on: January 12, 2010, 12:35:52 PM »
I'm trying to clean the rust from my shocks and was wondering if... they come apart, and if so, how. I see there's a nut at the top of the piston but can't reach it due to the spring. Anybody have a suggestion?
What am I doing and why am I doing it? Those are excellent questions.

'72 Amen Savior/'77 CB750K Chrome/Da Bhudda(project)
'73 CB750K Green/El Verde (beat)
'76 CB750K Red/The Cinnabomb (sweet)
'77 CB750K Black (frame and parts) CANNIBALIZED
'77 CB750K Dark Purpley/Scooty Puff, Jr. (la beast)
'78 CB750K Black (struggling) SOLD
'78 CB750K Blue Flake/CiocioSan (minty)
'81 CB750C Poiple/Barbie'sDreamMotorcycle SOLD (darnit!)
'89 Trek 21" 21 speed Green/YaBiatch (the wife)
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Offline Johnie

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Re: dismantling shocks
« Reply #1 on: January 12, 2010, 01:26:30 PM »
What bike?
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline thelowmax

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Re: dismantling shocks
« Reply #2 on: January 26, 2010, 07:07:51 AM »
1982 cb650
What am I doing and why am I doing it? Those are excellent questions.

'72 Amen Savior/'77 CB750K Chrome/Da Bhudda(project)
'73 CB750K Green/El Verde (beat)
'76 CB750K Red/The Cinnabomb (sweet)
'77 CB750K Black (frame and parts) CANNIBALIZED
'77 CB750K Dark Purpley/Scooty Puff, Jr. (la beast)
'78 CB750K Black (struggling) SOLD
'78 CB750K Blue Flake/CiocioSan (minty)
'81 CB750C Poiple/Barbie'sDreamMotorcycle SOLD (darnit!)
'89 Trek 21" 21 speed Green/YaBiatch (the wife)
Converse One Stars size 8.5 Black/Sneaks (suede)

Offline ColinMc

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Re: dismantling shocks
« Reply #3 on: January 26, 2010, 07:16:36 AM »
Pictures of the shocks would help...are they stock? Have they been replaced at some point in the life of the bike?
1976 CB750K - Cafe Project...taking forever
1984 Honda MB-5 - MB-8 conversion in process
2001 Ducati 748 - Built 996 motor sleeper

Offline camelman

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Re: dismantling shocks
« Reply #4 on: January 26, 2010, 01:54:08 PM »
A pic would help, but most shocks can be disassembled.  There should be a plate at the top of the shock with a notch in it.  The notch slides around the shaft of the plunger, and then the plate fits into place at the top of the shock when the spring pushes against it.  When the spring is compressed you can slide the plate out, and then the spring can be removed.  Clean everything back up, then reassemble in the same manner.
You will need a spring compressor, or a strong stomach, to compress the spring.  I don't have a spring compressor to fit small springs like these, so I just fold up a towel, put it over my stomach, and position the lower end of the shock against my stomach.  Then, pulling with two hands, I can compress the spring enough to slip the plate out.  Putting it back in usually requires a helper.  You don't have to be a muscle man to do this either.  I'm only 5'10" and 170 lbs.

Good luck.

Camelman
1972 350f rider: sold
1972 350f/466f cafe: for sale
1977 CB400f cafe:sold
1975 CB400f rider: sold
1970 CB750 K0 complete bike: sold
2005 Triumph Sprint ST 1050 rider

We've got to cut it off... and then come down on rockets.  (quoted from: seven minutes of terror)

Offline fmctm1sw

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Re: dismantling shocks
« Reply #5 on: January 26, 2010, 05:27:11 PM »
A pic would help, but most shocks can be disassembled.  There should be a plate at the top of the shock with a notch in it.  The notch slides around the shaft of the plunger, and then the plate fits into place at the top of the shock when the spring pushes against it.  When the spring is compressed you can slide the plate out, and then the spring can be removed.  Clean everything back up, then reassemble in the same manner.
You will need a spring compressor, or a strong stomach, to compress the spring.  I don't have a spring compressor to fit small springs like these, so I just fold up a towel, put it over my stomach, and position the lower end of the shock against my stomach.  Then, pulling with two hands, I can compress the spring enough to slip the plate out.  Putting it back in usually requires a helper.  You don't have to be a muscle man to do this either.  I'm only 5'10" and 170 lbs.

Good luck.

Camelman

Very interesting, I may try that.  Maybe put a board on my stomach?  Certainly one could fashion some sort of spring compresser as well I imagine.  I wonder if I can get a six pack doing that?
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1973 CB350F
1973 CB350G
1975 CB550K
1983 GL650I
1973 CB750K3 (http://forums.sohc4.net/index.php?topic=92888.0)
1984 Kawasaki KLT-250 (AKA 3 wheeler of death)
1994 Honda TRX300
1999 Honda TRX250

Offline Johnie

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Re: dismantling shocks
« Reply #6 on: January 26, 2010, 06:34:00 PM »
I have dismantled the KO, K1 & K4 with myself and my son with no tools. First be sure the shock is at the weakest setting. Then I push it down and my son will remove the 1/2 circle clips. Sometimes it works to have a paper clip to get under the lip of the clip.
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline gtyler5

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Re: dismantling shocks
« Reply #7 on: January 26, 2010, 07:02:35 PM »
you can also use large hose clamps, run them through the springs and tighten them down to compress. if the springs are pretty you might want to put tape or cardboard around the edges of the clamps as they can scratch. 
1976 CB750F cafe
1978 CB750F (in progress)
1993 CB750 Nighthawk

Offline Holubs

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Re: dismantling shocks
« Reply #8 on: January 26, 2010, 07:09:10 PM »
I made a jig out of two pieces of threaded rod and two pieces of light angle iron.  Tighten down the nuts to compress the springs, and take out the clip to disassemble the shock.  I am on the road, will try to take pictures when I get home.
Toys:
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Offline camelman

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Re: dismantling shocks
« Reply #9 on: January 27, 2010, 12:15:25 AM »
After the shock is apart, you may find that the pieces can be disassembled.  If not, then it is time for new shocks.  If the shock can be disassembled, then check for rebuild kits or look around on this forum for places to get seals and install new, appropriate weight oil.

Camelman
1972 350f rider: sold
1972 350f/466f cafe: for sale
1977 CB400f cafe:sold
1975 CB400f rider: sold
1970 CB750 K0 complete bike: sold
2005 Triumph Sprint ST 1050 rider

We've got to cut it off... and then come down on rockets.  (quoted from: seven minutes of terror)