Author Topic: ES Endurance rear shock gas pressure  (Read 4067 times)

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Mick Bailey

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on: June 03, 2015, 09:17:20 am
My bike is fitted with ES Endurance shocks and is now coming up to 8 years old.

The factory manual describes checking the gas pressure and re-charging with air. I've read elsewhere that the 'needle' referred to is a regular football inflator. Is it a good idea to do touch this at all? If the shock is pre-charged with nitrogen to benefit from the anti-foam properties, wouldn't re-charging with air diminish the effectiveness?

Also, is there any benefit to changing the pressure (with stock springs) to affect the ride quality?


Mr.Mazza

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Reply #1 on: June 03, 2015, 11:42:23 am
If you are happy then leave the pressure at stock.

But you can take it to a shock specialist and they should be able to recharge it with nitrogen at a desired pressure.
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ace.cafe

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Reply #2 on: June 03, 2015, 12:16:59 pm
Also, many tire shops now offer nitrogen inflation, so you may be able to get it done there.

Basically, they act stiffer if you pump them up more.
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Mick Bailey

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Reply #3 on: June 03, 2015, 02:16:55 pm
If you are happy then leave the pressure at stock.

I don't know if the shocks are still stock, or have lost pressure over the years. If they haven't I could lose too much pressure anyhow by checking them. Guess I need a shop to check/fill them unless it's OK to recharge with air instead. Most bikes I've owned have been designed for air, but if the Enfield is best on Nitrogen I'd prefer to stick with that.


cafeman

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Reply #4 on: June 03, 2015, 03:01:55 pm
My bike is fitted with ES Endurance shocks and is now coming up to 8 years old.

The factory manual describes checking the gas pressure and re-charging with air. I've read elsewhere that the 'needle' referred to is a regular football inflator. Is it a good idea to do touch this at all? If the shock is pre-charged with nitrogen to benefit from the anti-foam properties, wouldn't re-charging with air diminish the effectiveness?

Also, is there any benefit to changing the pressure (with stock springs) to affect the ride quality?
Is there some perfomance issue with the shocks? Signs of leakage or reduced damping? If not no need to muck about with them. The nitrogen gas charge is not adjustable. Most shocks like those take a prescribed psi. Add more and you run the risk of blowing the bladders. You need to change springs or the shocks to change the ride quality.


Mick Bailey

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Reply #5 on: June 04, 2015, 12:33:53 pm
It seems to bottom out with a harsher bump than it used to. No signs of leakage or corrosion. The roads here in the UK are getting much worse for potholes, so I could just be noticing it more as a result. 


tooseevee

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Reply #6 on: June 04, 2015, 05:49:07 pm
Most bikes I've owned have been designed for air, but if the Enfield is best on Nitrogen I'd prefer to stick with that.

            Nitrogen isn't used because it's "better". It's used because it's inert, reacts less to temp changes, no Oxygen molecules, less or no corrosion, migrates less. You wouldn't notice any difference in your butt between Air & Nitrogen. The potholes will still suck & probably get worse :(
RI USA '08 Black AVL Classic.9.8:1 ACEhead/manifold/canister. TM32/Open bottle/hot tube removed. Pertronix Coil. Fed mandates removed. Gr.TCI. Bobber seat. Battery in right side case. Decomp&all doodads removed. '30s Lucas taillight/7" visored headlight. Much blackout & wire/electrical upgrades.


no bs

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Reply #7 on: July 13, 2015, 07:42:20 pm
"air" is 78% nitrogen...
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tooseevee

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Reply #8 on: July 13, 2015, 09:27:39 pm
"air" is 78% nitrogen...

           Yes, it is. And what's your point?
RI USA '08 Black AVL Classic.9.8:1 ACEhead/manifold/canister. TM32/Open bottle/hot tube removed. Pertronix Coil. Fed mandates removed. Gr.TCI. Bobber seat. Battery in right side case. Decomp&all doodads removed. '30s Lucas taillight/7" visored headlight. Much blackout & wire/electrical upgrades.


Mr.Mazza

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Reply #9 on: July 14, 2015, 01:02:26 pm
And Too said, Nitrogen is better by being inert and ONLY Nitrogen, not a mix of oxygen, nitrogen, argon, water ect. That compressed air is.
This means it doesnt bleed through rubber (so tyres and seals in shockers) over time as much as air (much much much less) so longer times between refills.
Nitrogen also reacts less to temp changes than air, such as increase in temp does not increase pressure in the chamber compaired to air.
This makes it a better choice in high preformance or extreme applications.
Most automotive shockers are Nitrogen or another inert gas.
Lizzy - 07 500 Deluxe ES - Red and chrome - Sold.


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Reply #10 on: July 14, 2015, 01:14:25 pm
just agreeing with your previous statement. nitrogen in tires is snake oil; the tread will wear out before any benefit can be garnered by paying some morally deficient character to inflate your tires and install a green valve stem cap so you can help protect the environment. you know what p.t. barnum said!
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tooseevee

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Reply #11 on: July 14, 2015, 02:27:34 pm
     I just don't understand (actually, I do) how we, as a country, have come to the point where even a basic, innocent, inert gas like Nitrogen is now a political, "green" football that gets kicked around, like it really, really matters, to make some kind of political point.

      I didn't realize that this had come to the point of putting "green" valve caps on tires to make some kind of political statement. How silly. It's no wonder I avoid crowds more and more and fear more and more the fact that there are people making decisions and laws for us who have absolutely zero knowledge of the science of ANY subject. Many of them can't even correctly pronounce the words they throw around so freely in order to get other uninformed and misinformed idiots to vote for them.

       Sorry. I just can't help not commenting once in a while on how silly we all have allowed things to become. The ridiculousness (and damage it has done) of some of it is mind-scrambling and remember this is not pointing at any particular subject or person on this forum. Delete me or ban me at your pleasure.
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Reply #12 on: July 14, 2015, 04:13:14 pm
cool. let's do co2 next!
killing bugs since 1972 2011 g5 deluxe frankenbullet


mattsz

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Reply #13 on: July 14, 2015, 04:16:12 pm
You guys don't really think the green valve caps are there to make a political statement...

...do you?


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Reply #14 on: July 14, 2015, 08:18:31 pm
we get more than a few prius owners here in davis ca who fill their planet-saving hybrids with the green covered nozzle. it ain't easy being green...
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