45mm shivers no adjustments??

[darren]

I have a GG EC250 1998 with 45mm Shivers off an 07 bike.

When i first fitted them the Rebound and Compression adjusters made noticable difference when used.

I did Strip and service them when i fitted them and again 6months later.

At present winding the comp and reb adjusters fully clockwise there is no change in the fork character. In fact it is like riding a pogo stick at the mo.

I stripped one fork leg and checked the shim stack was intact, ( i did not bother to strip the other due to the fact they are both the same)

I was wondering what could be wrong. The marzocchi site talks about Inner rod pin blocked. Blocked compression and Contaminated oil.

Would these problems affect both settings? comp and reb
I know the oil is not contaminated.
Blocked compression would that affect rebound also?

With the inner rod pin I assume that would be the rod that sits in the tube which the rebound stack is attached to?

Also is the inner rod supposed to have a point on it? if it is then that could be my problem as mine looks fairly flat.

I wondered if the rebound piston seal/bush maybe was worn and allowing oil to pass around it instead of through it. But would that also affect the compression?

any help much appreciated. The manual i was looking at was on the website below.

http://www.marzocchi.co.uk/techinfo.html

[darren]

I stripped the forks today and thoroughly cleaned out everything. The forks were quite clean. The bottom valve was clean and free of obstructions, and the taper valve was clear and free.

I did notice that the check valve has additional shims on and the rebound stack is stock for the 07 forks.

I am at a loss now as i still have no noticable adjustments on comp and rebound.

I think they may need to go to a specialist if i get no help here.

[nick790]

Bad oil?
Rebound piston seal?

[darren]

Thanks nick.

The oil i am sure is and was ok as i had no problem when i first changed the oil Jan 09, and it is the same oil as i put in after teardown.

The Rebound piston seal i thought could be the problem but how would i know? Also would it be too much of a coincidence that the seal has gone on both legs at the same time?

thanks for the reply.
darren

[nick790]

The only obvious thing left, I'm affrayed.

You did something wrong mate

[darren]

Originally Posted by nick790

The only obvious thing left, I'm affrayed.

You did something wrong mate

How do you mean?

[nick790]

I don't know, but if they were working before you rebuilt them and aren't now, then it must be fault you have introduced.

Did they bleed ok? Mid valve working ok?

[darren]

Sorry bad explanation.

Feb 09 I bought them second hand. Stripped and cleaned. on completion they were working 100%

Dec 09 Stripped cleaned etc. no probs.

April 10 (Day before Enduro) I had been noticing in practice less feeling on front end so i thought i would add some rebound (on clickers) they did not respond. Checked compression and rebound fully in and fully out. no difference is felt.???
Rode the enduro with the front end acting like a pogo stick.

[moto9]

Originally Posted by darren

Sorry bad explanation.

Feb 09 I bought them second hand. Stripped and cleaned. on completion they were working 100%

Dec 09 Stripped cleaned etc. no probs.

April 10 (Day before Enduro) I had been noticing in practice less feeling on front end so i thought i would add some rebound (on clickers) they did not respond. Checked compression and rebound fully in and fully out. no difference is felt.???
Rode the enduro with the front end acting like a pogo stick.

IMHO, the rebound stack need to be stiffened up (a lot) specially the h/s, as well as removing any bleed shims.

[darren]

Originally Posted by moto9

IMHO, the rebound stack need to be stiffened up (a lot) specially the h/s, as well as removing any bleed shims.

Thanks for the reply.

I just cant understand why it was fine before but not now?

Which part of the stack is the H/S? I think there is only about 5 shims on the rebound side.

I dont think there is a bleed shim on the rebound.

There is on the compression i will have to post up the shim stacks tomorrow.

darren