Nitrogen charge for rear shock? - Chicagoland Sportbikes
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post #1 of 11 (permalink) Old 10-29-2013, 11:47 AM Thread Starter
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Nitrogen charge for rear shock?

I blew out my rear shock on my RM250 over the weekend. I have the parts on order and will rebuild it myself with no problems (I hope). Can anyone recommend a good shop in the NW suburbs to recharge the nitrogen?

Des Plaines Honda doesn't do it.
Arlington Motorsports doesn't do it.
DGY wants $45 which is more than I expected.
MCC in Villa Park will do it for $20 which is probably where I'll take it.

Is it me or have all of the dirt bike (and sport bike) shops vanished in the last 5 years?

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Chicago Cycle Center
The small shop on Route 12 in Palatine???

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post #2 of 11 (permalink) Old 10-29-2013, 12:00 PM
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There's a reason most of those shops are extinct. Good riddance.


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post #3 of 11 (permalink) Old 10-29-2013, 12:10 PM
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post #4 of 11 (permalink) Old 10-29-2013, 12:59 PM Thread Starter
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Quote:
Originally Posted by ravenr1 View Post
There's a reason most of those shops are extinct. Good riddance.
I agree. I'm suprised nobody has been able to step up and fill the void that they left. You got cycle gear selling some accessories and a few start up shops doing service, but very few OEM dealers now.

Considering how cheap this sport is to get started compared to some other 2-wheeled sports.

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post #5 of 11 (permalink) Old 10-29-2013, 03:26 PM
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have you done a shock before? I used to do a lot of forks but never tackled shock rebuilds, I have a friend in the city with a small garage shop who does them and the last 3 years I have had him do all my susp work, the labor is about 100$ including re-valve and if you don't like it he will re-do it and I decided its worth it to have someone who knows all the tricks do it
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post #6 of 11 (permalink) Old 10-29-2013, 04:46 PM Thread Starter
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Quote:
Originally Posted by elroy121 View Post
have you done a shock before? I used to do a lot of forks but never tackled shock rebuilds, I have a friend in the city with a small garage shop who does them and the last 3 years I have had him do all my susp work, the labor is about 100$ including re-valve and if you don't like it he will re-do it and I decided its worth it to have someone who knows all the tricks do it
I did a full rebuild on both front forks earlier this year with no issues. The rear should be a breeze. So far I have about $35 in parts, $20 in fluid, $50 in tools (seal bullet and driver) and $20 for the nitrogen. $125 this time around but only $60 next time since I'll have the tools.

Between my factory manual and youtube I feel comfortable doing it.

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post #7 of 11 (permalink) Old 10-29-2013, 05:27 PM
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not familiar with refilling shocks, but do they fill via a schrader valve like tires? if so, could you take it to a car dealer who fills tires with nitrogen?

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post #8 of 11 (permalink) Old 10-29-2013, 05:29 PM
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I think they hold 200-300 psi nitrogen
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post #9 of 11 (permalink) Old 10-30-2013, 10:40 AM Thread Starter
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They do have a valve that I believe is universal between bike and shock manufacturers. I would think its the same size as a tire schrader valve.

I never thought of a tire shop.

My RM250 gets 139.5psi. As long as the tire shop has a pressure regulator on the tank (which they should), and it is capable of 140psi (probably) they should be able to do it. I wonder how they verify the correct pressure after filling? My tire pressure gages only go to 100 psi.

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post #10 of 11 (permalink) Old 10-30-2013, 10:45 AM
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This sounds like a disaster waiting to happen.
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post #11 of 11 (permalink) Old 10-30-2013, 11:12 AM
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Quote:
Originally Posted by GotZuk? View Post
They do have a valve that I believe is universal between bike and shock manufacturers. I would think its the same size as a tire schrader valve.

I never thought of a tire shop.

My RM250 gets 139.5psi. As long as the tire shop has a pressure regulator on the tank (which they should), and it is capable of 140psi (probably) they should be able to do it. I wonder how they verify the correct pressure after filling? My tire pressure gages only go to 100 psi.
The problem with the shocks is that the volume is so small that by the time you get the gauge on to check it you have lost half your pressure.

You pretty much need to set the regulator to the correct pressure, fill until it equalizes, and pull it off very square so you don't lose the pressure.

My dad used to have a tank, but I don't think he does any more.

And Steve, yes, it can get messy quick if things aren't put together right. You get a pretty good splatter radius from that fluid if one comes apart at that pressure.

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