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brooklyn bike rider
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508 Posts
Discussion Starter · #1 ·
so i was wanting to pump up my fork air preload,
when i realized i pumped the wrong side.
(the right leg when sitting in the rider's seat)

the manual says the fork doesn't have negative air preload,
but when i plugged in the air pressure pump adapter air did release,
so there was some air in there in the first place.
at this point i know there's like 20 lbs of pressure in there.
should i pump it up more, leave it, or release it?
what will air pressure in that leg do?

i'm hoping someone here knows and can help.
if not, i'll just get in touch with marzocchi.

thanks in advance.
 

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customized
Joined
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3,119 Posts
Umm, the right side is the air assist.

I would let the air out, sit on the fork and add air until you have about 25-30% sag. That is just a start. You can play with oil height later. It is there to act as an air spring that assists the coils for heavier or more aggressive riders.

mosplat said:
so i was wanting to pump up my fork air preload,
when i realized i pumped the wrong side.
(the right leg when sitting in the rider's seat)

the manual says the fork doesn't have negative air preload,
but when i plugged in the air pressure pump adapter air did release,
so there was some air in there in the first place.
at this point i know there's like 20 lbs of pressure in there.
should i pump it up more, leave it, or release it?
what will air pressure in that leg do?

i'm hoping someone here knows and can help.
if not, i'll just get in touch with marzocchi.

thanks in advance.
 

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Can't get right...
Joined
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556 Posts
mosplat said:
air assist?
i heard about this but never knew my fork had it.
interesting.. cool.
thanks dude.
Air assist, air preload-same thing. I run mine at 45 PSI 4 the slatepark and dirtjumps and about 10-15 for trail riding. The more air the stiffer the fork feels. The less air the more sensative the fork is to small bumps and stuff. Instead of a knob pushing the spring in when u turn it(preload) it uses air. Hope this helps.
 

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brooklyn bike rider
Joined
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508 Posts
Discussion Starter · #5 ·
hmm, are you saying that i've to pump up both legs?
see, i've never touched the right leg til today (which severum says is air assist),
and i've pumped up the left leg (which is stated by zokie to be air preload)
and i felt almost no difference from 20psi in the air assist chamber,
when a difference of 5psi in the air preload chamber is very noticeable.

getting a little confused here..
but seeing as i'm fairly light and not a harsh rider,
i'll stick to adjusting the air preload for now.
that's been working fine thus far.
 

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Can't get right...
Joined
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556 Posts
mosplat said:
hmm, are you saying that i've to pump up both legs?
see, i've never touched the right leg til today (which severum says is air assist),
and i've pumped up the left leg (which is stated by zokie to be air preload)
and i felt almost no difference from 20psi in the air assist chamber,
when a difference of 5psi in the air preload chamber is very noticeable.

getting a little confused here..
but seeing as i'm fairly light and not a harsh rider,
i'll stick to adjusting the air preload for now.
that's been working fine thus far.
My left leg has the ETA system(30 mm lock out thing) and no air valve. Just my right leg has a valve. I've got a Z1 FR 04 w/ 20mm qr. Maybe u have an SL which im 99.999999% sure has air in Both legs. Sorry for the confusion. 7 beers, no dinner and 2 bowls....
 

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Can't get right...
Joined
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556 Posts
mosplat said:
haha it's all good.
i've definitely the regular sprung 04 Z1 FR with eta.
tomoro i'ma pop open both caps and get this all figured out.
it may just be me confusing myself.

thanks guys.
Careful w/ them little allen srews. they r tiny and can strip(or be lost) easy. Smoke a bowl-u'll figure it out......
 

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Registered
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666 Posts
If you have the 04 FR and not the 04 FR SL, then you only have air-assist/air-preload in one leg to set the amount of sag. The other side is ETA. You are only supposed to put max 15 psi in it. I weigh 155 and run w/o any air assist to get the right amount of sag.

To prevent bottoming out--you need to play with the oil height. Start with 150mm in each side and tweek it until it doesn't go CLANK anymore. Add a capful at a time to alternate legs. You can "cheat" on the air assist side and not have to pull the topcap--just use a syringe and "inject" about a capful in thru the air valve. If you're lucky, one extra cap on the air side and you'll be set. Otherwise you gotta loosen both topcaps and add a capful on the ETA side. Keep alternating sides until you get it setup right. If you have to add more than 4 or 5 capfuls, I'd look at getting stiffer springs.
 

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brooklyn bike rider
Joined
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508 Posts
Discussion Starter · #11 ·
so i've figured it out and set it up right,
thanks for all the help.

tho i must've been on something,
because i guess i was confused the whole time;
you guys were right about it only on one side.
but for some reason last time there was no noticeable difference once pumped.
this time 10psi and it's all good.

thanks again.
 

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Can't get right...
Joined
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556 Posts
mosplat said:
so i've figured it out and set it up right,
thanks for all the help.

tho i must've been on something,
because i guess i was confused the whole time;
you guys were right about it only on one side.
but for some reason last time there was no noticeable difference once pumped.
this time 10psi and it's all good.

thanks again.
Good to hear. Its a great fork once its setup right.When im straight i'm wrong most of the time. When i smoke im allllllright. Have fun.
 
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