45mm shivers no adjustments??

[darren]

Seal prices

Piston ring (rebound) Part No BE250114120---£5.28 +vat each
O-ring 2087 Piston (compression) Part No BE114246---£0.22 + vat each

If this sorts the problem i will be over the moon. saving £££ on tuners prices.

Reading your posts (nick790) it looks like you have had a journey with your forks.

 

[nick790]

opps, double post.

 

[nick790]

Yes.........it's been,.......errrr...........fun.....?????

 

[bergerhag]

Check out www.marzocchi.co.uk for spares. Example: piston ring £3.95.

I buy all my shiver spares from them .

 

[darren]

No parts yet.

Well i am still waiting on parts

I received the bottom valve o-rings from Gas Gas but unfortunately they are out of stock of the rebound piston ring.

Following Bergerhags suggestion i ordered them from marzocchi uk....but the order is still pending. So much for special delivery.

So annoying to be waiting on suppliers

 

[darren]

Gutted

Ok now i am gutted.

Gas Gas are out of stock and will not re order for two weeks due to the trial six day event in scotland.

Marzocchi are out of stock and will not expect a delivery for 4 weeks.

 

[nick790]

Thats a bugga!

Have you tried Dave at Bike tech?

Or Dr Shox or Steve Plain.

Or a Husky dealer, husky sport?

 

[darren]

Thats a bugga!

Have you tried Dave at Bike tech?

Or Dr Shox or Steve Plain.

Or a Husky dealer, husky sport?

Nick i phoned Dr Shox (hes only bout 20mile from me)

I have not tried anywhere else. Is Steve Plain a GG dealer? i recognise the name from somewhere.

I will have to have a phone around in the morning. Never thought of a husky dealer i will try that too.

I think i will have more chance of finding rocking horse s**t

I saw on ebay someone breaking a FSE450 they wanted £320 for forks clamps and rear wheel.....tempting.
They listed Ohlins forks but they sure looked like shivers to me.

thanks
darren

 

[darren]

Having just posted on Klausens post of Rebound no adjustment i thought i would up date this post.

After calling everyone under the sun to find one of these Rebound piston rings i have left it like this.
I am waiting on GG uk and marzocchi to see who comes up with the parts first.

Disturbingly after speaking to marzocchi uk and returning to the parts list on their web site it appears that the rebound piston ring has dissapeared off there list

Any way. Whilst waiting on these parts i took my inner rod (with the rebound piston attached) also the bottom valve down to MCT (suspension tuners)
He looked at the rebound piston ring and said there is nothing wrong with it and the teflon coating is only microns thick, more likely to wear the piston tube than the teflon (interesting)
He also stated that the shims on both Rebound and Compression stack were miles too thin and its not suprising i have no damping.
He said that he has done a few marzocchi shiver forks from new and they all are very soft.
I was advised to fill with 10w oil and if that did not work mix some 15w with it.

If all else fails he could revalve for me to what ever viscosity i wanted to run in the forks.

So

I have removed four shims out of the forks (the poxy 11mm ones.)
Filled with oil to 130mm air gap with 10w oil.

I have marginal difference when adjusting the clickers from fully in to fully out.

I have test ridden the bike it feels much the same as it did before.

Terrible.

I just hope these parts turn up soon.

 

[moto9]

I know its a little off the original thread i may also post this as a new thread, i have listed my shim stacks below just to see what response is received, and mabe i can make some adjustments accordingly while the forks receive the new rebound piston ring.

Some of the shim sizes seem a little odd compared to others i have seen posted see what you think.

I am 76kg + kit
Average clubman not worried about comfort just speed and stability.

NOTE i have done nothing with the shim stacks.


Rebound

Spring
15x0.3
15x0.2
15x0.3
22x0.3
11x0.2
Piston
21x0.1
19x0.1
17x0.1
15x0.1


Compression

Spring
22x0.3
Piston
11x0.2
22x0.12
11x0.2
20x0.12
19x0.1
11x0.1
18x0.1
17x0.1
16x0.16
15x0.2
12x.12

As i said some of the shims are odd (0.12)

Reading other posts on the site i thought mabe pulling the comp piston bleed shim 11x0.2 and also the first on the check valve (11x.02)
I cant be too radical as i only have the shims listed to play with.

Something doesn't look right with the rebound stack?
Is that a bleed shim off the piston face (11x0.2) ????
If so....pull it!


And I can't make any sense out of the BV stack either "that's a weird arrangement of shims.
looks like a 2 stage stack with a bleed shim, way over done.

What about this
BV
22x10
11x10
20x10
19x10
18x10
17x10
12x20

 

[darren]

Something doesn't look right with the rebound stack?
Is that a bleed shim off the piston face (11x0.2) ????
If so....pull it!


And I can't make any sense out of the BV stack either "that's a weird arrangement of shims.
looks like a 2 stage stack with a bleed shim, way over done.

What about this
BV
22x10
11x10
20x10
19x10
18x10
17x10
12x20

That is almost what i have done. i have pulled both the 11x10 in the BV and rebound stack.

Also pulled the 11x10 in the Check plate/mid valve.

I have tested it but it still feels bad. When i feather the throttle at high speed i get speed wobble. and on braking the front is still like a pogo stick.

 

[darren]

Still no sign of the Rebound piston rings But i would like to pick your brains on this web site where the Showa forks appear to have a 25mm piston ring.

Have a look your comments would be appreciated, I may even buy some to try for the sake of £12 a pair. Even if i have to buy the piston itself it may just work in the shivers.

http://www.k-tech.uk.com/product_detail.php?id=2413

 

[moto9]

Still no sign of the Rebound piston rings But i would like to pick your brains on this web site where the Showa forks appear to have a 25mm piston ring.

Have a look your comments would be appreciated, I may even buy some to try for the sake of £12 a pair. Even if i have to buy the piston itself it may just work in the shivers.

http://www.k-tech.uk.com/product_detail.php?id=2413

I would ask Les at LT racing...or Some one on thumper talk.
I would think that you would have to accurately measure the stock band and compare it to the showa one.
Also there is a correct way to install them.
Have you tried Race Tech suspension they may have a split band that is easier to install.

 

[darren]

I would ask Les at LT racing...or Some one on thumper talk.
I would think that you would have to accurately measure the stock band and compare it to the showa one.
Also there is a correct way to install them.
Have you tried Race Tech suspension they may have a split band that is easier to install.

Thanks i think i will send a e-mail to LT racing see if he would ship to england if he has any.

 

[Klausen]

fyi

my new piston rings arrive 3 weeks ago from Spain to austria to germany.
only 3 weeks this is OK

 

[darren]

fyi

my new piston rings arrive 3 weeks ago from Spain to austria to germany.
only 3 weeks this is OK

Have you fitted them yet ? If so how much difference have they made?

Going to chase mine up tomorrow Give GG uk a kick up the butt.

 

[darren]

Well Well since hearing about Klausen receiving his piston rings i contacted GG uk and my rebound piston rings were sitting in the shop mmm.

I have received them today along with a complete new bottom valve (which i ordered cos the thread on the aluminium adjuster body was weak) But the adjuster comes with comp piston shims adjuster complete. which i did not expect.

Crack on tomorrow putting new ring in and see what happens.

 

[GMP]

I may have mentioned this in another thread, but unless your rebound piston ring has distinct shiny spots indicating the teflon coating has worn away there is nothing wrong with it. I have these forks, 100 hrs and the rings are fine. The lack of response from the adjusters is from the huge amount of free bleed in the system. If a big change was noticed after a disassembly/reassembly. I would suspect something went wrong there to introduce more bleed, like a misplaced shim. If the midvalve stack/checkplate is sticking or for whatever reason not sealing on the piston face, forget rebound control. Don't sweat the piston rings, go back to where you were last and see what happened.

This fork works real well with a proper spring rate, little preload, a reasonable compression stack with no free bleed, and a lot more rebound.

 

[darren]

Update

I have now fitted the new rebound piston rings and put everything back to standard settings including the shim stacks.
As recommended in the Marzocchi manual i have filled up with 7.5 w oil with a 90mm air gap.

First impressions on winding the rebound fully in i can feel resistance on the up stroke. Winding fully out the fork definitely rebounds quicker. This is the same for the compression.

Before there was absolutely no difference when this was tried.

I believe there is definitley an improvement.

Although I know it is on a different scale, but , the ohlins on my 300 goes almost rock hard when clickers are wound in.

Have a ride out at the weekend and see how it goes but i have high hopes that this has solved my problem.

I will try to post some pictures of the old rebound piston rings for ya all to google at. Lookin at them they are definitely worn but the teflon coating is still on although there are some gold specs reflecting. The new rings measured up almost exactly the same but the coating was noticably duller. If that makes sense.

 

[bchatt]

One thing here confuses me. You say you have now put in 7.5w oil, to a height of 90mm. Earlier in this thread you had done a strip down and put in 10w oil to a height of 130(or something). Those 2 variables alone could make a huge difference. I have found 7.5 to be a good oil in these forks. Filled to 90mm sounds a bit high to me, it will work fine but may feel pretty firm near the end of the travel.
What I'm thinking is that maybe the original level of 130mm was too low, and the ring thing is just a wild goose chase