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1986 CR 125 Shock Question

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Hey gang, I just bought a running but beat up 1986 cr125 for $500 to take out and thrash around in the dirt. I'm not trying to pump a bunch of money into this bike but I'd like to get it running happy.

 

First thing I'm looking at is the rear shock. It's really squishy and bottoms out if I sit on it and jump up and down. I'm only 165 pounds to help paint this picture. I pulled it out and cleaned it up a little, from the outside there's no signs of major trauma or damage. I checked the reservoir and it is empty.

 

Soooo, is this something I could rebuild myself and take to a shop to have the reservoir filled?

 

Where can i find the needed seals or are there rebuild kits for this year available?

 

Does it make more sense to replace the shock? And if so what other years would I be able do a straight swap with?

 

I've looked into a couple local shops and they're telling me it will $200-300 for them to rebuild it. I'd like to avoid having to fork over that kind of money if I can do the work myself.

 

Thanks

 

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Send the shock to a suspension specialist to be rebuilt. The suspension is such a major factor in a motorcycles ride, control, safety & overall enjoyment of the ride. If you need to spend a little money on this part of the bike, it is a worthy area.

From the shock being blown, there may be damage done to the shock body & most likely the nitrogen bladder. It will at least need the shock piston band replaced as well as a new bladder.

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Lazerviking, I'm in the process of rebuilding my 86 shock. I found all OEM parts, they are out there if you want to do a little searching. Mine

was in bad shape so I just decided to get it back to stock specs and go from  there. Do you have a manual? If not I would get one it helps

a lot and there is a lot of videos on u tube. I'll be glad to help if I can.

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It's not hard woth basic knowledge.

The only thing you'll need to do is have someone fill it with nitrogen after you finish.

Should be less than $100 for all seals and bearings.

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Cool, thanks everyone for the advice. I feel pretty confident in my ability to actually rebuild the shock I think I just have a harder time with knowing what parts I actually need to replace and how/where to find them. I'm on budget so I'm leaning towards rebuild myself and have the reservoir filled by a shop afterward.

 

Unfortunately the shock is taking a back seat to what I found while I was trying to change out the coolant today. Look like a combination of blown seal allowing oil and coolant/water to mix throughout the gearbox and the PO gummed everything up using seafoam

IMG_0676.JPG

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The motions of rebuilding a shock are simple. Having ut bled properly is another thing. Alot of people think they have it figured out but in reality, alot of air still remains.

With that said, if you want to try it & hone that craft, you need to start somewhere.

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Unfortunately it's usually a pitted crankcase cover that let's the water and oil mix with the 86s since the cover is made from magnesium.

If its not to bad, you can seal it with jb weld. If you need a new cover, it will be quite expensive.

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Nothing's ever simple :banghead:

 

Unfortunately it's usually a pitted crankcase cover that let's the water and oil mix with the 86s since the cover is made from magnesium.
If its not to bad, you can seal it with jb weld. If you need a new cover, it will be quite expensive.

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Lazer if you need parts there is a company in Fort Worth Texas called Mr motorcycle 817-624-7861 also check their website, I have 2 cr-2fiddys from the 80s also, and I purchased a nice shock for $80 dollars, tell em what you need and they will find it for you!
 

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