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Rear shock rebuild

Old 05-21-2018, 05:14 AM
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Rear shock rebuild

I want to rebuild my original Showa rear shock. I know that better option would be buying some aftermarket shock, but still I want to try rebuilding first.

I have already opened the shock and installed a schrader valve on the top of the shock for charging nitrogen back to the shock. But now I have a problem. It seems that there is a fixed internal floating piston or bladder inside the shock body. Thus I don't know how to bleed the system. There doesn't seem to be any bleeding valves in the bottom cap either. Or is there an intention that there is only certain amount of shock oil and air below the floating piston. This doesn't sound very logical. I have rebuild several shocks, but never seen this kind of shock.

Only way I could imagine is following:

1. Push the internal piston to lowest point using pressure
2. Fill the shock body full of oil
3. Install the shaft with valving back to the shock body
4. Push the bottom cap in place and little bit over to install retaining ring. Hopefully there is no air inside the shock body now and internal piston has moved up little bit.
5. Charge the nitrogen back to the shock, which presses the bottom cap to correct position

Is this correct way to re-build the shock?
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Old 05-21-2018, 05:48 AM
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Jamie is the guy to ask,,,,
I decided not to spend the needed $$$ on the OEM Showa shock as the Swapped in converted F41 Showa with new spring and valving was a better shock at the same cost.
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