View Full Version : Question about an '02 Marz Z1 FR QR20
S.n.a.k.e.
07-24-2003, 10:55 AM
Hello all,
What effect would running different compression damping on each leg have on the forks performance?
Somehow I was under the impression that the right fork was compression damping for the whole fork. Needless to say, I've been running the left leg at no damping, and the right leg at 3 turns of damping for the entire summer........ what an idiot I am.
Please discuss.
Thanks,
Marc
those are both rebound, btw, there's no adjustable compression.
They don't have to be at the same setting. I wouldn't run one fully closed and the other fully open, but 3 turns of difference between them isn't going to hurt anything. Equalize 'em out if you like things to be nice and symmetrical, otherwise it's not like you've harmed the fork. Some of the Marz. only have one rebound cart and it does the job fine.
Originally posted by sub6
those are both rebound, btw, there's no adjustable compression.
I thought the '02s were HSCV right leg, and ECC rebound left. That's the way mine was, at least...
S.n.a.k.e.
07-24-2003, 12:57 PM
According to the manual (I will post the relevant section later from home), both legs have compression dampers, actually, they are spring preload adjusters.
The right leg has the rebound damper, and the left leg has the ECC lockout.
I have had minor oil seepage on the left fork leg, and wondered if the difference in compression damping was causing the fork legs to compress at different rates causing the seepage. Only time will tell I guess.
Thanks,
Marc
Originally posted by ohio
I thought the '02s were HSCV right leg, and ECC rebound left. That's the way mine was, at least...
OK, now I'm all confused.
HSCV cart - right leg is rebound.
ECC cart - left leg is ECC and rebound, no? Or just ECC? sorry about the dumb-ness, I thought ECC had rebound control in it...
Originally posted by S.n.a.k.e.
According to the manual (I will post the relevant section later from home), both legs have compression dampers, actually, they are spring preload adjusters.
The right leg has the rebound damper, and the left leg has the ECC lockout.
I have had minor oil seepage on the left fork leg, and wondered if the difference in compression damping was causing the fork legs to compress at different rates causing the seepage. Only time will tell I guess.
Thanks,
Marc
OH OH OH. hahaha.
NO.
Compression dampers are inside the fork, they're valves or shim stacks that control how fast the oil flows thru. That's "compression adjustment."
Spring preload is the big black knobs on the top of the fork. That ajusts the preload on the spring (duh) and has no effect on the damping adjustment. It serves to make the fork stiffer, or sag less. That is not "compression adjustment."
Running different amounts of preload isn't going to hurt anything at all. Especially with only 3 turns difference.
Originally posted by sub6
OK, now I'm all confused.
HSCV cart - right leg is rebound.
ECC cart - left leg is ECC and rebound, no? Or just ECC? sorry about the dumb-ness, I thought ECC had rebound control in it...
HSCV = "high speed compression valving" and is in the right leg. So compression damping is on the right, and is adjustable.
ECC = "extension control cartridge" which functions by closing the rebound valve so tightly, the fork can't extend. The rest of the time it acts as a standard rebound cartridge. It is however, not adjustable except by changing oil weight, but the default setting is about spot on.
And snake, sub 6 is absolutely right about the preload knobs. Differences in preload (or damping for that matter) will not cause seepage. You probably just have a seal that's gone bad and needs replaced. For example, my downhill forks have the springs on one side and the damping on the other. It causes no binding or seal seepage.
Um, so what you're saying is that an '02 Z.1 FR doesn't have (externally) adjustable rebound? I don't think so.....
Originally posted by ohio
HSCV = "high speed compression valving" and is in the right leg. So compression damping is on the right, and is adjustable.
I'm gonna call BS on that one; all the hi-end Marzocchis have "HSCV", including my Shiver DC, and it DEFINITELY doesn't have adjustable compression. Both carts adjust the rebound. Obviously, there is a certain amount of compression damping inherent to the cartridge itself, but it's not adjustable unless you want to go in there and change the shims yourself.
The only adjustable compression damping Marz has ever done was the ill-recieved '00 carts, and the '03 MonsterT with the moto carts.....
at any rate, the amt. of compression damping that the HSCV provides is virtually nil, it amounts to a high-speed bottom-out control. That's why Marz. use about 90% of travel 98% of the time, whereas a Boxxer (which has real comrpession damping) has a much different feel to it....
Originally posted by sub6
I'm gonna call BS on that one; all the hi-end Marzocchis have "HSCV", including my Shiver DC, and it DEFINITELY doesn't have adjustable compression.
Boom. You just blew my mind.
I double checked my manual, and you're completely right. Rebound adjustable only. Unless you want to fack with oil weight.
Except that I disagree about the functionality of HSCV... it's FAR better than any of the dual rebound or '00 comp. cart. Zokes I've been on.
And I'd hardly call the boxxer's compression damping "real." I just went from a boxxer to a white brothers... NOW I have real compression damping.
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