Help! Rock Shox Judy experts.. need advice please.

[chaser]

Ok, I have two NOS 97 Judy XC forks.

I've got coil springs for them both as the elastomers went solid [with age I guess]

One of them has a Risse Racing GEM Cartridge - this works fine.

So now I have an original RS damping cart' going spare.

My question is...

Can I use the spare original cartridge to replace the dummy rod so the fork is running a damping cart' in both legs?

There does not seem to be any leak but the rebound is way fast with the springs installed using the original RS cart'. Maybe the original elastomer set up had some inherent damping and now the springs are installed they are too powerful for the damper.

I was thinking if I ran two cart's it would slow the fork rebound down a bit.

What do you think?

Cheers,

Chaser

 

[FluffyChicken]

You probably could they are identical each side. But the damper cart also does the rebound afaik
If you place two in there they would be working against each other, the slower one doing all the work.

Have you tried adjusting the damper cart and working out what is best for you ? Or changing the oil in it to something heavier. Of course it effect compression as well. Just depends how well they damp in each direction.

Only other option is get the downhill setup which has a rebound and compression cart.

Hopefully some old school RS tweaker will know about the carts. Most I know it where they go, and how to take one apart (only the apart bit )

 

[chaser]

Thanks FC,
I'm not too sure what you mean about them working against each other.
Yes, I have treied adjustment, it's on full slow. The heavier damping oil might be a good idea, if I knew how to take it to bits and how much oil to put in.
I also only know a bit
Cheers,
Chaser.

 

[FluffyChicken]

Well the system as a whole would work at the slowest damping one (making the other irrelevant) and given they are different carts they will work differently through their stroke even if you could match their 'rate'
This to me with quick direction changes just says extra strain, while e.g. while one is still compression damping the other could have switched to rebound damping.
That is if they do do both. No idea what the Risse cart does.

I'd wait for more advice, as that's just my advice.
I doubt you would break one if you gave it a go.

 

[chaser]

Yes, they do both compression and rebound (in one cart)
On the point of 'only as good as the slowest' surely it's like spring rates.. If you have two hard springs and then change one of them for a soft one, there would be an averaging out of the spring rate. I am thinking same will apply with damper?
They can't work against each other as the compression damping only works on the downstroke and the rebound only works on upstroke. As my wife tells me...'I am not always right but I am never unsure' ;-)
Cheers,
Chaser.

 

[FluffyChicken]

The working against would be for that short period when it switched from rebound to compression and vice versa. Be it some internal valve flip or turbulence in the oil flow.
The Risse might do it quicker than the RockShox or vice versa It may 'lock' under quick vibrations (it may well not )

But if oil is flowing through the damping valve at a slow rate, then in the other leg that oil cannot be doing a lot, there is not enough force to cause the 'friction'.

Mind If they where matched pretty well I would think the forks may last longer as then not all damping is forced though on leg causing the slight twisting in the whole fork.

I could easily be talking bollocks, but that's just what my brain is thinking at the moment.

 

[chaser]

Lol I am sure you're not talking B...'s
Actually, the dampers would both be the RS originals.
I have two forks.. Both have speed springs, one has Risse cart which leaves me with two RS carts for the other one. So, in theory they should be quite well matched.
Cheers,
Chaser.

 

[cce]

give it a go, what's to lose?