83 interstate 1100 front air shocks


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marve319
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Motorcycle: 1983 GL110 Interstate

83 interstate 1100 front air shocks

Postby marve319 » Sat Mar 16, 2013 5:54 pm



Hi Guys, Just bought an 83 Interstate 1100 and I am having a problem keeping air in the front shocks. Use the center stand and put in around 10-14 psi and within a couple of hours it is gone. Bike is riding rough in the front. I tightened the front air hose, as it was a little loose, but that has not helped. Any help out there?? Used soapy water and could not find any leaks.



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trashtruck
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Re: 83 interstate 1100 front air shocks

Postby trashtruck » Sat Mar 16, 2013 6:54 pm

could be bad crossover hose, or bad seals between upper and lower fork legs. i assume all parts are factory original?
WHAT IS THE SPEED OF DARK?

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Sat Mar 16, 2013 10:37 pm

The seals look fairly new. I am not sure if all the parts are factory. I checked the fittings on the cross over hose and the ball seal inside on the right side looked a little worn, but there does not appear to be any leakage there. I also changed the inside piece on the valve. I was told by the previous owner that the forks had not been re-built. Maybe I should go ahead and rebuild them with new seals and put in progressive wound springs.

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trashtruck
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Re: 83 interstate 1100 front air shocks

Postby trashtruck » Sat Mar 16, 2013 11:28 pm

you may just be looking at the dust cap for the tube seals. the actual seal is under this, held in by a clip. question, if the po says never rebuilt how could the seals be new? just curious. the crossover hose has rubber orings for each side, check them also.
WHAT IS THE SPEED OF DARK?

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Sun Mar 17, 2013 12:25 am

I seen the small round rubber O rings on the right side of the cross over hose. I didnt know if you could buy replacements for those. I thought you had to get a new hose. Your right about the dust cover and the seal being under it. I didn't know that before. I have been looking at ways to redo the forks and saw that. Is that all I need to order is the seal and dust cover, or is there something else in there?

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trashtruck
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Re: 83 interstate 1100 front air shocks

Postby trashtruck » Sun Mar 17, 2013 7:51 am

i beleive the orings for the crossover are still available from honda. there is other stuff in the fork tube but you should be able to get away with just a seal kit, also still available. if not try cyclemax.com. they should have what you need. i cant remember exactly who, i think dan filipi, has a good front fork rebuild video on youtube.
WHAT IS THE SPEED OF DARK?

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Mon Mar 18, 2013 9:33 am

I took the cap off at the top and about got knocked out, but learned something so its okay. Anyway there was two springs, a short one and then the long one. Is this normal?? Also the springs were full of crud and dirt, looked like they have been on there for 30 years. I am ordering the dust cover and seal kit and progressive springs. Will I still need to put air in the front forks if I change the springs to progressive springs?? I suppose I should take the forks completely off the bike in order to clean out the upper tube. Any help you can give me is appreciated.

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trashtruck
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Re: 83 interstate 1100 front air shocks

Postby trashtruck » Mon Mar 18, 2013 10:06 am

i dont have progressive springs so i cant answer your question. sounds like po preloaded the front as all my info only shows one spring for each fork. lots of folks modify a peice of pipe or board to aid in reassembly of the caps. more leverage and less chance of cross threading that way.
WHAT IS THE SPEED OF DARK?

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RoadRogue
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Re: 83 interstate 1100 front air shocks

Postby RoadRogue » Mon Mar 18, 2013 2:43 pm

You are going to want to remove the forks from the bike to completely clean the crud out. While you have it apart you may as well install new bushings ,they are cheap enough, these along with the new springs and fresh oil will make them better than new. 8-)
Ride safe, Todd
Over night campers welcome

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Greg_C
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Motorcycle: 1980 GL1100 Interstate (sold)
1976 GL1000 (WIP)

Re: 83 interstate 1100 front air shocks

Postby Greg_C » Mon Mar 18, 2013 5:57 pm

These are the springs that came out of front forks of my '80 GL1100 project bike.

OEM GL1100 Progressive front fork springs
OEM GL1100 Progressive front fork springs


Based on my review of the Honda service manual found on this site these appear to be the standard originally installed springs. The longer ones are progressive rate springs, and the shorter one puts preload on the spring.

If yours look like this then based on manual pictures this is normal oem part. In the troubleshooting section hard front suspension can be caused by amongst other things clogged hydraulic passages. Or for 83- older clogged orifice in anti- dive. Section 12-4 of service manual has additional trouble shooting info. I believe adding air is normally used to further stiffen up the suspension... Less air or no air pressure will give softest ride. Also note that a small amount of air is bled off each time you check air pressure. I would check all o-rings and put lite coat of ATF or petroleum jelly on each.

Based on your description of the crud found a full disassembly and cleaning / rebuild may be in order. If you are not wanting to take font forks off bike, You could dump in some varsol or kerosene with drain bolt removed to try and flush out this crud, old oil.... Work the suspension up and down to force fluid out... Only do one shock at time if forks still on bike. Once you flush out the old oil, dump in small qty of new ATF, to force out remaining varsol/ kerosene and let it drain out, force it out...then put drain bolt back in, put cleaned up springs back in, dump in specified amount of ATF, then compress preload spring with cap and screw cap back on. (easier said than done).

Do this to both shocks and without adding any air check to see if there is any improvement in the stiffness in front suspension... Hope this helps... Good luck.
Current Rides:
1976 GL1000 (WIP)
2004 Dodge Ram 2500 Cummings Diesel - Camper puller
2006 Toyota Corolla - My Daily driver
Past Rides:
HMCS Assiniboine (DDH 234)
1980 Porsche 911 SC Targa
1979 MGB Roadster
1980 GL1100 Interstate

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Tue Mar 19, 2013 7:29 am

Thanks I will give that a try. I did not know that the 83 had progressive shocks already. It would almost seem senseless to buy new progressive shocks. I don't have a manual. Where would I be able to get one?? What you are telling stands to reason, because the springs are really dirty, you almost can't see between them with all the crud. I appreciate your help.

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Greg_C
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Re: 83 interstate 1100 front air shocks

Postby Greg_C » Tue Mar 19, 2013 6:38 pm

Go to the manuals section on this site ... look up your model year and you will find the Honda Service manual ... it covers all years for the GL1100 ...
you can save it on your computer as pdf file ... or print it off the section of interest on your local printer ... is big document ...

the document describes the OEM spring "wear limits" ... as over time the spring may loose some of its tension/strength over time ... if the overall unloaded spring length meets the range specified and they both are same length you are ok to re-use... a good cleaning / flushing of the shock internals and cleaning up the springs should make big ... i also read adding too much ATF/fluid can make for harder suspension.

good luck.
Current Rides:
1976 GL1000 (WIP)
2004 Dodge Ram 2500 Cummings Diesel - Camper puller
2006 Toyota Corolla - My Daily driver
Past Rides:
HMCS Assiniboine (DDH 234)
1980 Porsche 911 SC Targa
1979 MGB Roadster
1980 GL1100 Interstate

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Wed Mar 20, 2013 5:20 am

All of you guys are great. I really appreciate all the information. I will let you all know how it turns out. I am really happy with this goldwing, and thus far the front forks are the only problem that I am having.

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Greg_C
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Motorcycle: 1980 GL1100 Interstate (sold)
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Re: 83 interstate 1100 front air shocks

Postby Greg_C » Wed Mar 20, 2013 11:34 am

Your year bike has an "anti-dive" mechanism located down at bottom of front forks ... its purpose is to close off some of the orfices under hard braking conditions, so the nose of the bike does not come down hard as the internal springs are compressed ... the manual says that hard suspension can also be caused by blocked orfices in this device ... am not familair with it .. others on this site may be more so ... perhaps worth removing it, cleaning/flushing it and reinstalling it as well.
Current Rides:
1976 GL1000 (WIP)
2004 Dodge Ram 2500 Cummings Diesel - Camper puller
2006 Toyota Corolla - My Daily driver
Past Rides:
HMCS Assiniboine (DDH 234)
1980 Porsche 911 SC Targa
1979 MGB Roadster
1980 GL1100 Interstate

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Thu Mar 21, 2013 11:09 am

Does anyone know where I can buy the bushings?? I may not have to, but I am thinkng it would be a good idea since it appears nothing has been done with my forks and it is an 83. How do you know if the bushings are still good? I have ordered the dust cover and seals and a set of progressive springs. I will be taking the forks off the bike this weekend and start cleaning and checking everything. Honda dealer here says the parts have to be ordered and they seem to be more expensive through the dealer. Any suggestions on the bushings?? I believe there a two to each fork?

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Fri Mar 22, 2013 11:03 am

I will be installing fork seals and dust covers along with new progressive fork springs. When I took my apart there was a 4" to 6" spring on the top. Will I need to install the short springs back when I put in the new springs?

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Greg_C
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Motorcycle: 1980 GL1100 Interstate (sold)
1976 GL1000 (WIP)

Re: 83 interstate 1100 front air shocks

Postby Greg_C » Fri Mar 22, 2013 1:14 pm

You will need to follow the instructions provided with the supplier of the new progresive springs ...
Current Rides:
1976 GL1000 (WIP)
2004 Dodge Ram 2500 Cummings Diesel - Camper puller
2006 Toyota Corolla - My Daily driver
Past Rides:
HMCS Assiniboine (DDH 234)
1980 Porsche 911 SC Targa
1979 MGB Roadster
1980 GL1100 Interstate

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marve319
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Motorcycle: 1983 GL110 Interstate

Re: 83 interstate 1100 front air shocks

Postby marve319 » Fri Mar 22, 2013 8:38 pm

Okay I will do that. I want to thank all of you for helping me out. I know that I was probably becoming a pain. But anyhow thanks for the help.

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Greg_C
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Motorcycle: 1980 GL1100 Interstate (sold)
1976 GL1000 (WIP)

Re: 83 interstate 1100 front air shocks

Postby Greg_C » Fri Mar 22, 2013 9:15 pm

Don,t worry about being pain... Keep asking your questions.., The bike enthusiasts on this site are happy to help... My daughters boyfriend just put new springs in his bike to replace the OEM shocks.... They came with very specific instructions.
Current Rides:
1976 GL1000 (WIP)
2004 Dodge Ram 2500 Cummings Diesel - Camper puller
2006 Toyota Corolla - My Daily driver
Past Rides:
HMCS Assiniboine (DDH 234)
1980 Porsche 911 SC Targa
1979 MGB Roadster
1980 GL1100 Interstate

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marve319
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Joined: Sat Mar 16, 2013 5:31 pm
Location: Chesapeake, Virginia
Motorcycle: 1983 GL110 Interstate

Re: 83 interstate 1100 front air shocks

Postby marve319 » Fri Mar 22, 2013 9:51 pm

I appreciate that, thanks a lot.

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Sun Mar 24, 2013 2:25 pm

Started pulling the forks off today. One side under the dust cover is a washer (worn out). Anyone know where I can buy theses? Can I just go to local hardware and pick up a washer or is it specific to the bike?

eveready
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1985 Suzuki 1200 Madura
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Re: 83 interstate 1100 front air shocks

Postby eveready » Mon Mar 25, 2013 12:01 am

www.bikebandit.com can help with the parts your looling for.

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marve319
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Re: 83 interstate 1100 front air shocks

Postby marve319 » Mon Mar 25, 2013 4:14 pm

Thanks, but bike bandit does not carry washers and bushings for the 83.

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trashtruck
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Re: 83 interstate 1100 front air shocks

Postby trashtruck » Mon Mar 25, 2013 7:10 pm

try cyclemax.com. they may have what you're looking for.
WHAT IS THE SPEED OF DARK?

doctorpaul
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Re: 83 interstate 1100 front air shocks

Postby doctorpaul » Tue Mar 26, 2013 6:33 am

marve319 wrote:Started pulling the forks off today. One side under the dust cover is a washer (worn out). Anyone know where I can buy theses? Can I just go to local hardware and pick up a washer or is it specific to the bike?

Are you referring to the 'washer' that goes between the top of the oil seal and the circlip? Honda calls this a 'backing ring' and there are two per side. Another one goes under the seal and is a bit different in thickness and shape, as I recall. That is the one often damaged during fork disassembly. I cannot figure out how the upper backing ring could be "worn out". Some pics of the actual part you need would be helpful!


Dr. Paul
1980 Honda GL1100I
NE Oklahoma


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