WP fork question

GG121
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279
Joined
3/17/2022
Location
USA
Edited Date/Time 11/11/2022 9:21am
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This is my first time on a bike with air forks so I am not sure if this is a common feeling. At high speeds, the forks feel too soft, slow to respond and too low in the stroke; but then at slow speeds they feel like a pogo stick. I want to increase my rebound, but I am worried this will worsen the pogo stick feeling. Is it possible that the fork is too deep in the stroke and I need to decrease compression? I am on completely stock clickers, I weigh 160lbs and have been running 135psi. Is my psi too low? The shock feels amazing compared to the fork. Any insight is greatly appreciated!
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YZed250
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Location
Costa Mesa, CA, USA
11/2/2022 8:25am
GG121 wrote:
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This...
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This is my first time on a bike with air forks so I am not sure if this is a common feeling. At high speeds, the forks feel too soft, slow to respond and too low in the stroke; but then at slow speeds they feel like a pogo stick. I want to increase my rebound, but I am worried this will worsen the pogo stick feeling. Is it possible that the fork is too deep in the stroke and I need to decrease compression? I am on completely stock clickers, I weigh 160lbs and have been running 135psi. Is my psi too low? The shock feels amazing compared to the fork. Any insight is greatly appreciated!
How many hours on your fork? Is it broken in yet?
GG121
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USA
11/2/2022 8:28am
GG121 wrote:
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This...
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This is my first time on a bike with air forks so I am not sure if this is a common feeling. At high speeds, the forks feel too soft, slow to respond and too low in the stroke; but then at slow speeds they feel like a pogo stick. I want to increase my rebound, but I am worried this will worsen the pogo stick feeling. Is it possible that the fork is too deep in the stroke and I need to decrease compression? I am on completely stock clickers, I weigh 160lbs and have been running 135psi. Is my psi too low? The shock feels amazing compared to the fork. Any insight is greatly appreciated!
YZed250 wrote:
How many hours on your fork? Is it broken in yet?
About 5 hours of riding time
YZed250
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11/2/2022 8:37am Edited Date/Time 11/2/2022 8:39am
GG121 wrote:
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This...
I have noticed an odd fork response on my '22 GasGas 125 that I don't ever recall having before on my bikes in the past. This is my first time on a bike with air forks so I am not sure if this is a common feeling. At high speeds, the forks feel too soft, slow to respond and too low in the stroke; but then at slow speeds they feel like a pogo stick. I want to increase my rebound, but I am worried this will worsen the pogo stick feeling. Is it possible that the fork is too deep in the stroke and I need to decrease compression? I am on completely stock clickers, I weigh 160lbs and have been running 135psi. Is my psi too low? The shock feels amazing compared to the fork. Any insight is greatly appreciated!
YZed250 wrote:
How many hours on your fork? Is it broken in yet?
GG121 wrote:
About 5 hours of riding time
That's still pretty fresh and might still be breaking in. Now is a good time to double-check your baseline settings - bleed fork, reset triple clamp and axle torque specs, check front axle alignment.

I don't have this model, but the GG line-up has a reputation for being softer than the SX range. I wouldn't hesitate to add some clicks (2+ comp and 4+ rebound) once you've double checked the front-end assembly and warmed up the fork.
2
Factor E
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So Cal, CA, USA
11/2/2022 10:43am
Any clanking noise?
WP known to come apart internally

The Shop

R VanKamp77
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Location
Portland, TN, USA
11/2/2022 11:16am
Saying that the suspension on these bikes needs to break in is code for "it takes a while to get used to"

You're learning why there are 400 different spring conversion options for them. Either way, I agree with some more compression, and don't be afraid to add some air to it also. They're great forks and I think everyone can adjust them to some level of happiness. Also, carefully set the torque and alignment of the front end. It's not going to fix your problem but it's part of the journey to singling out what you don't like and fixing it.
7
AJ565
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San Antonio, TX, USA
11/2/2022 4:53pm
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are you running? If the rear is not set up right then it makes the forks feel terrible.

Maybe give these a try?
Air pressure: 151 psi
Compression: 12 clicks out
Rebound: 18 clicks out
4
Bruce372
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11/2/2022 8:51pm
AJ565 wrote:
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are...
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are you running? If the rear is not set up right then it makes the forks feel terrible.

Maybe give these a try?
Air pressure: 151 psi
Compression: 12 clicks out
Rebound: 18 clicks out
Read the third line people, read the third line.

Amen Brother.
AJ565
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11/3/2022 12:07am
AJ565 wrote:
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are...
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are you running? If the rear is not set up right then it makes the forks feel terrible.

Maybe give these a try?
Air pressure: 151 psi
Compression: 12 clicks out
Rebound: 18 clicks out
Bruce372 wrote:
Read the third line people, read the third line.

Amen Brother.
Jokes on you, I don’t know how to read lol
wrc777
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Greenwood, IN, USA
Fantasy
11/3/2022 5:04am
KTM says 120 psi for that fork stock on a 125 and you are in the target weight range for the stock settings on that bike. If you are going to run much higher pressures you probably need to crank in the rebound clicker to keep it under control.

Also make sure you bleed both fork chambers when you set the air pressure. Also make sure you do this with the bike on a stand and not with bike on the ground.
FGR01
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USA
Fantasy
11/3/2022 3:57pm
AJ565 wrote:
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are...
Personally I think 135 is too low. I’ve had better luck bumping it up to get it up in the stoke more. Also what sag are you running? If the rear is not set up right then it makes the forks feel terrible.

Maybe give these a try?
Air pressure: 151 psi
Compression: 12 clicks out
Rebound: 18 clicks out
I generally agree with the "more air less damping" philosophy on these AER's. But we're talking about a 125 here.

For reference, I weigh 180-185 and I run 158psi on my 350 and 130psi on my 125 to achieve relatively the same feel/performance. I'd say OP should try around the 120-125 psi range.
3
GG121
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Location
USA
11/3/2022 8:49pm
FGR01 wrote:
I generally agree with the "more air less damping" philosophy on these AER's. But we're talking about a 125 here. For reference, I weigh 180-185 and...
I generally agree with the "more air less damping" philosophy on these AER's. But we're talking about a 125 here.

For reference, I weigh 180-185 and I run 158psi on my 350 and 130psi on my 125 to achieve relatively the same feel/performance. I'd say OP should try around the 120-125 psi range.
Thank you, I’m going to try going lower pressure!
Bearuno
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AU
11/4/2022 12:29am Edited Date/Time 11/4/2022 12:31am
Something to consider is that the positive and negative air chambers are not being seperated. And, though it usually results in collapse, or "stuck down syndrome" , it can happen intermittently.

The too soft and front end riding low, can indicate that the positive chamber pressure has transferred to the negative chamber, thus the 'spring element' is reduced.

And, conversely , you then say at low speeds ( and, perhaps low travel usage) that it feels like a pogo stick. That can be a product of pressure from the negative chamber, transferring to the positive, giving you a high 'spring element', and, to top it off ( bad pun, I know) what ends up as a (very) high pre-load level.

Air transfer between positive and negative chambers is inevitable, things wear. And, things can be damaged, badly installed, have an out of specification part , chemistry ( re: seals) or dimension from new, or, just simply fail early.

While I have little personal experience with WP air forks, I have massive experience with Air Sprung Suspension - decades of it, through just one of my professions.

It's something to consider, as are all of the previous comments .
wrc777
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Greenwood, IN, USA
Fantasy
11/4/2022 4:24am
The aer fork rebalances the chambers every time it reaches near full extension.
1
Bearuno
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AU
11/4/2022 5:26am
wrc777 wrote:
The aer fork rebalances the chambers every time it reaches near full extension.
Yes indeed it does.

But, sometimes, it doesn't, if the seal between them is not sealing properly, after it goes either side of the transfer port.
johnk408
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Ft Mitchell, KY, USA
11/8/2022 2:51pm
Put an o'ring or zip tie around a fork leg and see if it is bottoming out. Adjust pressure until the o'ring stops a couple inches before bottoming, then adjust compression and rebound. This is basically finding the "spring" rate for you. For reference as stated above about running too much, I run around 123-125 on my 150SX and weigh about 40 pounds more.
2
sandman768
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Saratoga Springs, NY, USA
11/10/2022 11:58am
johnk408 wrote:
Put an o'ring or zip tie around a fork leg and see if it is bottoming out. Adjust pressure until the o'ring stops a couple inches...
Put an o'ring or zip tie around a fork leg and see if it is bottoming out. Adjust pressure until the o'ring stops a couple inches before bottoming, then adjust compression and rebound. This is basically finding the "spring" rate for you. For reference as stated above about running too much, I run around 123-125 on my 150SX and weigh about 40 pounds more.
Job #1 with aer forks…. Once your air spring setting is achieved, then you move on to fine tune with clickers, fork height ect. As others have stated, your rear shock sag has to be in the ballpark or your front end will never feel right.
GG121
Posts
279
Joined
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Location
USA
11/11/2022 9:21am
Your manual shows 120psi. Probably worth starting there and stock clicker settings. [img]https://p.vitalmx.com/photos/forums/2022/11/10/576204/s1200_aer.jpg[/img] Taken from here: https://azwecdnepstoragewebsiteuploads.azureedge.net/22_3215051_en_OM.pdf
Your manual shows 120psi. Probably worth starting there and stock clicker settings.



Taken from here:
https://azwecdnepstoragewebsiteuploads.azureedge.net/22_3215051_en_OM.p…
Yep I was going off fork pressure suggestions from posts here and did not think about how a 450 might have different spring rates than a 125 with the same size rider. Hopefully will be able to ride next week and will report back how it feels at 120 !
GG121
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Location
USA
1/9/2023 5:32am

Been a while but I finally got a chance to ride yesterday and the forks feel great at 120psi! Thanks everyone 

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