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Shims - Rear Shock 1998 kdx 220

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i have just inspected my rear shock shims for both rebound and compression stacks.

 

Most of the shims have marks \ impressions from the preceding and post shims and look like thay have been in place for a long time - like since 1998 perhaps??

 

i had to grind the peen off the shaft to reach these shims - so i am presuming these shims are original.

 

are these marks \ impressions bad and will they adversely affect performance?

 

should i replace all of these shims?

 

 

byte

Edited by Byte

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Marks as in their bent?  Put them on a piece of glass and check if they are still flat.  If they aren't (flat) then its probably a good time to get new shims.  If they're just superficial marks on the surface, then I wouldn't worry about it.

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Don't you think 15 years is well beyond the service life of shims?

Edited by H-B-R

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I've read shims do loose stiffness over time and factory teams replace the shims for new ones just like bushes etc , I guess if they are worn to the point you can feel it then they need replacing , if they are flat but softer than new ones ( I would expect this to be true ) then a few extra on the stack would not hurt

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I read elsewhere that there is a rebound needle inside the shock shaft.

 

Is this correct?

 

 

Byte

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True for all shocka

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nothing came out of my shock shaft...

 

the needle does not show up in the parts list...?

 

can you show me a link showing where this rebound needle is located...?

 

 

byte

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It must have a needle to close off the rebound

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i have read that if you grind the ping off straight across then the rebound parts will come out.

 

is this correct?

 

i had to grind the ping straight off across to access the shim assembly.

 

does this mean that my shock shaft is unusable now?

 

byte 

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Only on a showa

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