Air suspension


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warnett
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Location: Stockdale, Texas
Motorcycle: 1982 gl1100 aspencade

Air suspension

Postby warnett » Wed Mar 20, 2013 2:24 pm



82 Asp Book does say slow down below 50mph if rear pressure warning light comes on. Is this for safety or can there be damage to the shocks. I notice it doesn't say anything about the front shocks. I also notice that on the 83 you can run zero on the rear. The reason I'm asking, besides not to mess up anything, is it does make the bike lower when letting the air out and since my legs are not that long I can reach the ground better. Of course on the highway I pump them to normal. All compents welcome.



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virgilmobile
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Re: Air suspension

Postby virgilmobile » Wed Mar 20, 2013 3:33 pm

With zero air pressure in the rear,the amount of free travel of the rear wheel is reduced (safety) thus the warning lamp.The manufacture wants a specific amount of travel and height in the suspension to safely operate the bike above 50 mph....The front air pressure has less of an effect thus no warning.I can run from 0 to 5 psi in the front and notice only a bit smoother ride.
If distance to the ground is a issue,inquire(search) about lowering the bike by replacing the rear shocks and front springs.

bustedwing
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Re: Air suspension

Postby bustedwing » Wed Mar 20, 2013 4:47 pm

You can cause damage to the transmission rear seal by jamming the drive shaft too far into the transmission when the suspension is bottomed out and you hit a bump. You need to have some travel in the suspension without bottoming so you don't damage the drive line.
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WingAdmin
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Re: Air suspension

Postby WingAdmin » Wed Mar 20, 2013 5:17 pm

bustedwing wrote:You can cause damage to the transmission rear seal by jamming the drive shaft too far into the transmission when the suspension is bottomed out and you hit a bump. You need to have some travel in the suspension without bottoming so you don't damage the drive line.


The drive shaft doesn't push into the transmission when the suspension compresses - it has a universal joint that pivots at the same place that the swingarm does.

zbird
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Location: Barberton.Ohio
Motorcycle: 1981 GL1100i

Re: Air suspension

Postby zbird » Thu Mar 21, 2013 4:24 pm

On the subject of the air pressure switch,can you ground the wire attached to it to the frame to by pass it? I am going to a shock that does not require air therefore it is not needed.I have a 1981 1100.

warnett
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Motorcycle: 1982 gl1100 aspencade

Re: Air suspension

Postby warnett » Thu Mar 21, 2013 5:51 pm

I believe just disconnect it or remove blub.

Oaktree454
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Location: Greenville, South Carolina
Motorcycle: 1982 Honda Goldwing Aspencade 1100

Re: Air suspension

Postby Oaktree454 » Wed May 15, 2013 4:27 pm

I filled my air rear air shocks on my 1982 1100 Goldwing aspencade to the highest suggested level 57 psi but when I go over a bump it still bottoms out. Can I go past the suggested 57 without causing any damage to the shocks? Whats the Max or is there another problem? I weigh 204lbs and no passenger is on it to cause this.

bustedwing
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Re: Air suspension

Postby bustedwing » Wed May 15, 2013 5:53 pm

I know others will not like what I say, but I have gone as high as 95 psi with no ill effects. Please take into account I have a trike which has two rear shocks, and they were oem .The trike rides comfortable two up, although we have hit a few hard bumps so you do have to keep a sharp eye for them, especially when riding two up.I have no idea if stock shocks would handle the pressure.
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Oaktree454
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Re: Air suspension

Postby Oaktree454 » Wed May 15, 2013 6:54 pm

Yea, thanks bustedwing, I think Im gonna try taking it up a little more.

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bcassel
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Re: Air suspension

Postby bcassel » Thu May 16, 2013 5:44 pm

Higher air pressure will work, for a while. Then you will hit a bump and the pressure will push the oil past the seals and you lose your air and the ability to have the shock perform.

I'd suggest to do what I did: Invest $60 in Progressive springs to install in the rear. Made a world of difference. I COULD run without air in the rears and still not bottom out, but I usually run 35 in them just to stiffen up the system.

Oaktree454
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Re: Air suspension

Postby Oaktree454 » Thu May 16, 2013 6:41 pm

Thanks cassell, I will look into that as well cause I took the air to 70 and that helped a lot but I can still feel a thump at certain speeds and size of dip.

bustedwing
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Re: Air suspension

Postby bustedwing » Fri May 17, 2013 8:49 am

I have run as high as 120 psi with a "larger" passenger but normally run 90 psi and have been doing this for 2 years now with no problems. By the way Wing Admin, it's not the u joint that jams into the transmission seal, it's the slip yoke. At least that is how mine is built.
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warnett
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Location: Stockdale, Texas
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Re: Air suspension

Postby warnett » Fri May 17, 2013 10:27 am

Interesting. I have an 82 and run minum pressure with no problem. I way 200

bustedwing
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Re: Air suspension

Postby bustedwing » Sat May 18, 2013 9:26 am

Warnett, keep in mind I have a trike and the rear suspension has been modified. I also weight north of 200 and my passenger is also the same.


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