No loss Air pump for forks?

usafwx
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usafwx
Edited Date/Time 4/24/2017 3:35pm
I was curious can't seem to find a no loss Air pump for my new air forks, 2016 crf250r, anyone have any recommendations? I have the Honda pump with adapter but it still loses a good deal of air from the balance chamber when removing the chuck. Thanks in advance!
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Skerby
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Skerby 4/23/2017 11:53am
4/23/2017 11:53am
All fork/shock pumps are no loss. They are set at the pressure that they read when you remove the pump. You notice a loss when you reattach the pump because it takes air to bring the pump volume up to pressure.
usafwx
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usafwx 4/23/2017 12:51pm
4/23/2017 12:51pm Edited Date/Time 4/23/2017 12:53pm
Skerby wrote:
All fork/shock pumps are no loss. They are set at the pressure that they read when you remove the pump. You notice a loss when you...
All fork/shock pumps are no loss. They are set at the pressure that they read when you remove the pump. You notice a loss when you reattach the pump because it takes air to bring the pump volume up to pressure.
Damn I'm an idiot. Learn something new everyday, first set of air forks. Was wondering why every time I went to reattach the pressure was off/dropped. I also noticed Air escaping as I remove it though too.
xnationalwrench 4/23/2017 4:18pm
4/23/2017 4:18pm
If you can find a FOX air filler (for their old air shocks) that is the best way to not have any air loss.

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usafwx
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usafwx 4/23/2017 5:35pm
4/23/2017 5:35pm
xnationalwrench wrote:
If you can find a FOX air filler (for their old air shocks) that is the best way to not have any air loss.
Thanks! I know Skerby alluded to not really losing air when you reattach that I understand, but I'm pretty sure its losing air especially the balance chamber at the bottom of the leg when I'm trying to disconnect, I can hear escaping air as I screw it off.
fulltime wrench 4/23/2017 11:26pm
4/23/2017 11:26pm
The air you hear escaping is coming from the pump/gauge. Watch the gauge as you are disconnecting. You will see the needle fall to zero at the same instant you hear the air escape.
tempura
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tempura 4/24/2017 1:55am
4/24/2017 1:55am Edited Date/Time 4/24/2017 1:56am
Most of the air you hear, will be releasing from the pump chamber. When you screw the pump on, I'm confident you're not hearing it?
That's the least of your worries with these CRF forks..lol
Keeping consistent pressure throughout a day is near impossible.
usafwx
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usafwx 4/24/2017 8:43am
4/24/2017 8:43am
tempura wrote:
Most of the air you hear, will be releasing from the pump chamber. When you screw the pump on, I'm confident you're not hearing it? That's...
Most of the air you hear, will be releasing from the pump chamber. When you screw the pump on, I'm confident you're not hearing it?
That's the least of your worries with these CRF forks..lol
Keeping consistent pressure throughout a day is near impossible.
Nope no escaping air when I screw it on, just when I screw it off, which makes me think I'm losing air, so I reattach and its like 15 psi lower, so was going 15 extra yesterday to compensate, guess I was wrong there. The CRF guys over in thumper talk were making it sound like you definitely lost air removing the pump. Appreciate it.

As far as the forks I don't see what the big deal is. As a novice C guy I had no issues, they felt fine all day. I did adjust my pressure before each moto to be consistent, which I can agree is a PITA but other than that they aren't terrible forks.

Thanks for the help!
usafwx
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usafwx 4/24/2017 8:44am
4/24/2017 8:44am
fulltime wrench wrote:
The air you hear escaping is coming from the pump/gauge. Watch the gauge as you are disconnecting. You will see the needle fall to zero at...
The air you hear escaping is coming from the pump/gauge. Watch the gauge as you are disconnecting. You will see the needle fall to zero at the same instant you hear the air escape.
Well that makes too much sense. Need to take more lessons from you guys. The thumper talk guys seem to think its air escaping from the fork. Thanks for the help!
Falcon
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Falcon 4/24/2017 3:35pm
4/24/2017 3:35pm
Here's a test for you: See if you can loosen your pump ever so slightly until you hear a constant hiss. If you can, you should be able to empty your fork of all pressure. If you cannot, it means there is never any air loss from the fork when unscrewing.
My guess is that you won't be able to bleed off air pressure using only the thread of your pump.
tempura
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tempura 4/24/2017 10:47pm
4/24/2017 10:47pm
tempura wrote:
Most of the air you hear, will be releasing from the pump chamber. When you screw the pump on, I'm confident you're not hearing it? That's...
Most of the air you hear, will be releasing from the pump chamber. When you screw the pump on, I'm confident you're not hearing it?
That's the least of your worries with these CRF forks..lol
Keeping consistent pressure throughout a day is near impossible.
usafwx wrote:
Nope no escaping air when I screw it on, just when I screw it off, which makes me think I'm losing air, so I reattach and...
Nope no escaping air when I screw it on, just when I screw it off, which makes me think I'm losing air, so I reattach and its like 15 psi lower, so was going 15 extra yesterday to compensate, guess I was wrong there. The CRF guys over in thumper talk were making it sound like you definitely lost air removing the pump. Appreciate it.

As far as the forks I don't see what the big deal is. As a novice C guy I had no issues, they felt fine all day. I did adjust my pressure before each moto to be consistent, which I can agree is a PITA but other than that they aren't terrible forks.

Thanks for the help!
They do have a bit of a numb feeling, but aren't bad.
The constant adjusting throughout the day is annoying me though. If I set them up in the morning, by noon, they are getting harsh.
I'm on the look out for some 12 or 13 model Spring forks, I can just slide in.
usafwx
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usafwx 4/25/2017 6:11am
4/25/2017 6:11am
tempura wrote:
They do have a bit of a numb feeling, but aren't bad. The constant adjusting throughout the day is annoying me though. If I set them...
They do have a bit of a numb feeling, but aren't bad.
The constant adjusting throughout the day is annoying me though. If I set them up in the morning, by noon, they are getting harsh.
I'm on the look out for some 12 or 13 model Spring forks, I can just slide in.
"numb" perfect way to describe them. Not harsh but can totally agree compared to my KYB SSS stuff they just don't have as much or any feedback/feeling.

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