Good luck. Being the owner of 2 Mastodons, I will be monitoring this.Literally, my Mastodon is sucking down. I though something strange was going on and I started playing with the IVA to see if I could use the travel better, but that's when I noticed my travel o-ring at about 100mm...except it's a 140mm fork. Pulling up on the bars and pushing down on the crown, yeah there's a bunch of suck-down going on. With all the air out, it bottoms out where it should, but it only comes out as around 100mm or so when aired up. What gives? Popped the damper bottom open, nothing going on there.
Am I right in guessing there's no equalization port for this fork between negative and positive springs?
Manitou Sucks
Literally, my Mastodon is sucking down. I though something strange was going on and I started playing with the IVA to see if I could use the travel better, but that's when I noticed my travel o-ring at about 100mm...except it's a 140mm fork. Pulling up on the bars and pushing down on the crown, yeah there's a bunch of suck-down going on. With all the air out, it bottoms out where it should, but it only comes out as around 100mm or so when aired up. What gives? Popped the damper bottom open, nothing going on there.
Am I right in guessing there's no equalization port for this fork between negative and positive springs?
Am I right in guessing there's no equalization port for this fork between negative and positive springs?
1 - 20 of 45 Posts
Good luck. Being the owner of 2 Mastodons, I will be monitoring this.
That really sucks man, sounds like you blew a seal.
Here we go...That really sucks man, sounds like you blew a seal.
That's just ice on his beard.That really sucks man, sounds like you blew a seal.
Hey! Seals have a right to be happy too!That's just ice on his beard.
Equalization is done when the pump is connected and the fork must be pulled up to be fully extended (or the bike hangIng) when setting pressure. If it is not extending all the way, either your pump is not engaging the poppet all the way or it needs to be adjusted.
I have a crappy pump and a good pump, I've been using the crappy one recently and that may be it. I remember having some similar trouble getting the air chamber to do it's thing when filling a shock res recently, so it may just be a bad pump attachment. I'll try that first before trying to take off the lowers, which is a convulted opposite-direction special-tool process. Pulling the fork is not easy though, as it must be filled upside down and there's nothing to keep it at full extension.Equalization is done when the pump is connected and the fork must be pulled up to be fully extended (or the bike hangIng) when setting pressure. If it is not extending all the way, either your pump is not engaging the poppet all the way or it needs to be adjusted.
Just pull the bars up and unthread the pump. You can tell if the pump is properly engaged by cycling the fork while it is hooked up. If you can cycle it while the pump is connected, all is good. If it is ramping way up as you compress it, it is not engaging properly.I have a crappy pump and a good pump, I've been using the crappy one recently and that may be it. I remember having some similar trouble getting the air chamber to do it's thing when filling a shock res recently, so it may just be a bad pump attachment. I'll try that first before trying to take off the lowers, which is a convulted opposite-direction special-tool process. Pulling the fork is not easy though, as it must be filled upside down and there's nothing to keep it at full extension.
P.S.- From one grumpy old guy to another, you are starting to sound like a grumpy old guy. Now get off what is left of my lawn.
Well, not exactly, both pumps cause it to suck down when attached, but if I manually push that poppet down after filling and pull the fork, sure enough it equalizes, but what a pain in the ass. Like my pumps aren't engaging the poppet, even though they are standard MTB shock pumps. I hate when Manitou stuff is bizarrely different for no reason (like why can't it equalize at top out like every other fork, rather than having to turn it upside down, take off the valve, find something to push the poppet with, etc.). Last night I thought my air spring was screwed, but it just seems that you need a "special manitou pump" for this, like you need a "special manitou 8mm socket" and "special manitou crow-foot damper tool" to service it...
Sounds like the poppet is slightly misadjusted. It should stick out about 1.5-2mm. As you know, transfer ports have their disadvantages also, they can clog with grease, they can cause seals to wear early, they are fixed, so some people are happy with the feel off the top, some want softer (look at the people complaining about the two different ones in the lyrik). Pick your poison.
If anything, the poppet sticks out too far?, I can't imagine that's the issue. I also can't tell why it would have ever changed.Sounds like the poppet is slightly misadjusted. It should stick out about 1.5-2mm. As you know, transfer ports have their disadvantages also, they can clog with grease, they can cause seals to wear early, they are fixed, so some people are happy with the feel off the top, some want softer (look at the people complaining about the two different ones in the lyrik). Pick your poison.
I have nothing to add, except I’m pretty sure that saying anything negative against Manitou at this forum can lead to serious consequences. Tread lightly.
Moderator, please delete this inflammatory post.I have nothing to add, except I’m pretty sure that saying anything negative against Manitou at this forum can lead to serious consequences. Tread lightly.
1) It could have been misadjusted from the factory.If anything, the poppet sticks out too far?, I can't imagine that's the issue. I also can't tell why it would have ever changed.
2) If you have had it a while, it could have moved, **** happens.
3) Your pumps could both be worn from your years of use and both are having marginal engagement on the transfer port.
4) Dougal sensed you were going to post something negative and cast an evil New Zealand native curse on your fork.
Hobbits.1) It could have been misadjusted from the factory.
2) If you have had it a while, it could have moved, **** happens.
3) Your pumps could both be worn from your years of use and both are having marginal engagement on the transfer port.
4) Dougal sensed you were going to post something negative and cast an evil New Zealand native curse on your fork.
See what I mean? 😝Moderator, please delete this inflammatory post.
You beat me to it.Equalization is done when the pump is connected and the fork must be pulled up to be fully extended (or the bike hangIng) when setting pressure. If it is not extending all the way, either your pump is not engaging the poppet all the way or it needs to be adjusted.
Sent from my SM-G991U using Tapatalk
Why do you turn the bike upside down? I've always had the bike wheels down when adjusting the pressure of the Magnum fork.
I had to replace my shock pump - after several years of usage the thrrads started to wear out. With normal Schrader valve it still worked ok, but the extra pressure of the Manitou poppet valve made it hard to attach the pump - I felt there is a threat of cross-threading. With new pump I had no problems.
There was good test suggested - with pump attached you should be able to easily compress the fork like it's not inflated. If this is not the case then it's the poppet valve not opening. Otherwise the problem is somewhere else.
I had to replace my shock pump - after several years of usage the thrrads started to wear out. With normal Schrader valve it still worked ok, but the extra pressure of the Manitou poppet valve made it hard to attach the pump - I felt there is a threat of cross-threading. With new pump I had no problems.
There was good test suggested - with pump attached you should be able to easily compress the fork like it's not inflated. If this is not the case then it's the poppet valve not opening. Otherwise the problem is somewhere else.
1 - 20 of 45 Posts
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