Air pressure in rear shock


Information and questions on GL1500 Goldwings (1988-2000)
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fnickel
Posts: 66
Joined: Mon Oct 29, 2012 7:59 pm
Location: Campbellville, ON, Canada
Motorcycle: 1992 GL1500SE

Air pressure in rear shock

Postby fnickel » Sun May 10, 2015 6:37 am



I just found out that my air compressor works. I had never used it since I got the bike 2 years ago. The ride had been OK, even 2 up, and we had never bottomed out. When I lifted the bags to remove the rear wheel and check the splines, I had to remove the air line to the rear shock, and I noticed that air pressure released as I loosened the line fitting. Now that I have it back together, I noticed that I was bottoming out on bumps, and the tire was rubbing somewhere, probably the plastic inner fender. I need to pressurize the air shock, and that is how I discovered that the compressor works. The display does not show the air pressure. How long should I have the compressor running to get adequate air in the system? Is there another manual way to check the pressure? I assume this will affect ride height as well. Maybe I could measure the change in height at the back of the bike somehow. How much change in ride height should I attempt to get? Our 2-up rider and passenger weight is about 400 pounds. Thanks for any advice on this.



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RBGERSON
Posts: 2621
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Air pressure in rear shock

Postby RBGERSON » Sun May 10, 2015 8:57 am

most do around 40lbs. max is 52?? checking manually not simple not sure it can be done..but if there is a port to check it it's under a lot of tupperware!!

note to see the air pressure the bike has to on ac and not running look in your users manual for the details..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

Big Bob
Posts: 80
Joined: Fri Feb 21, 2014 11:43 am
Location: Rosemount, Minnesota
Motorcycle: 1996 GL1500A Aspencade

Re: Air pressure in rear shock

Postby Big Bob » Sun May 10, 2015 10:17 am

Back when my '96 Aspencade still had the stock rear shock on it I ran between 28-32# in it. I now have a Progressive 450 AIS shock and I run between 10-12# in it. One of the best aftermarket additions was adding that shock to the bike. Of course at over 100,000 + miles the rear shock was shot, so something had.

Bob to change
Bob Payette
Rosemount, MN
'96 GL1500A Aspencade, Red The Best Color!
143,000 miles and still going strong!
A bad day off is better than your best day at work!

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ct1500
Posts: 813
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: Air pressure in rear shock

Postby ct1500 » Sun May 10, 2015 8:33 pm

No easy way that I know of to check air pressure without dash readout.

A more practical approach would be to see how many seconds it takes of running compressor to fully charge air shock. And then while listening to air bleeding off on depressurization from full charge to zero take note of the time required.

With some extrapolation from other members chiming in on number of seconds required bleed down for a certain pressure it will get you in the ballpark of a certain psi.

All while on center stand.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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gordonv
Posts: 168
Joined: Sun Oct 04, 2009 6:39 pm
Location: Richmond BC
Motorcycle: 1988 GL1500
1999 GL1500CF
1982 GL1100A

Re: Air pressure in rear shock

Postby gordonv » Sun May 10, 2015 8:41 pm

Since you've confirmed the compressor is working, I would look into fixing the systems.

Mine was trouble because the switches weren't working. Cleaned them up and learned how to use it.

If you don't have the readout working in the dash, then I would change your system out, and replace the compressor line for a manual valve, and just use your own compressor and gauge.

You don't want to over fill it and blow it out. Then you'll be looking for a new rear air shock, and still run the risk of blowing the new one out sometime.

fnickel
Posts: 66
Joined: Mon Oct 29, 2012 7:59 pm
Location: Campbellville, ON, Canada
Motorcycle: 1992 GL1500SE

Re: Air pressure in rear shock

Postby fnickel » Sun May 10, 2015 8:48 pm

All is well now. I see the pressure reading on the dash now. The compressor is working, and it seems to be holding pressure. If I had an owner's manual, I might be more familiar with these things, but one never came with the bike when I bought it. Is there an on-line version available, or another way of getting one? Thanks.

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RBGERSON
Posts: 2621
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: Air pressure in rear shock

Postby RBGERSON » Sun May 10, 2015 9:18 pm

no for free helms sells them..check above on the manual link


HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB


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