Fork cap leaking.


Information and questions on GL1100 Goldwings (1980-1983)
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chris22indy@att.net
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Joined: Tue Aug 28, 2018 7:30 am
Location: United States
Motorcycle: 1983 GL1100

Fork cap leaking.

Post by chris22indy@att.net »



So my fork seals seem to be fine but one fork is leaking at the cap. Cam I just replace the cap seal? If so can anyone help with the procedure?

1983 gl1100 standard.


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roadwanderer2
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Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
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Re: Fork cap leaking.

Post by roadwanderer2 »

I believe this is the OEM seal part number your looking for.......91356-MB4-003 and you can find it on this website.....www.partzilla.com Once you find it and purchase it/them, they are the same for both sides if memory serves me correctly. Which side is leaking, the side with 2 airline fittings or the one side with one fitting. Once you establish which side it is, I should be able to walk you thru it as I have changed both caps, seals and springs on my 86 aspencade. They should be the same as your 83. honda didn't do much changing on these front forks over the years. You'll need to get a 12 point half inch drive socket that just fits over the top of the caps. If you don't have one that fits, you can make one out of an old socket to fit it like I did. Let me know if these are the correct seals you're looking for first before we go any farther. If they aren't I can look up the part numbers to check again, but im pretty sure im correct with them.

Stuart, a.k.a. roadwanderer2.
chris22indy@att.net
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Motorcycle: 1983 GL1100

Re: Fork cap leaking.

Post by chris22indy@att.net »

Looks like I need this one 91356-463-003 instead.
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roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
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Re: Fork cap leaking.

Post by roadwanderer2 »

Ok, so it looks like there is a difference between the 83 and the 86 O rings, not sure what it is, but it is. If your sure these are the correct ones, order one or 2 of them. Once you have them get back to me and we'll talk on how to go about changing them.

Stuart, a.k.a. roadwanderer2.
chris22indy@att.net
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Motorcycle: 1983 GL1100

Re: Fork cap leaking.

Post by chris22indy@att.net »

Cool thanks for the help
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roadwanderer2
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Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
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Re: Fork cap leaking.

Post by roadwanderer2 »

chris22indy@att.net wrote: Wed Oct 16, 2019 2:14 pm Cool thanks for the help
Your welcome.

Stuart, a.k.a. roadwanderer2.
chris22indy@att.net
Posts: 21
Joined: Tue Aug 28, 2018 7:30 am
Location: United States
Motorcycle: 1983 GL1100

Re: Fork cap leaking.

Post by chris22indy@att.net »

I've got the parts and I'm getting ready to tear in to it. Any help you can provide is greatly appreciated.
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roadwanderer2
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Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
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Re: Fork cap leaking.

Post by roadwanderer2 »

Hi chris22. Glad to hear you got the parts for your fork job. First thing is....Do you have access to either an engine hoist or a garage with a steel overhead beam or with a 12"x12" wood beam and a "come-along" like this one?.......https://www.harborfreight.com/1200-lb-c ... 30131.html Which is actually the quickest way to do this job, well, at least for me it was.

Stuart.
chris22indy@att.net
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Re: Fork cap leaking.

Post by chris22indy@att.net »

Unfortunately I do not.
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roadwanderer2
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Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
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Re: Fork cap leaking.

Post by roadwanderer2 »

chris22indy@att.net wrote: Sat Oct 26, 2019 4:13 pm Unfortunately I do not.
Do any of your friends have the space that they are willing to let you use and maybe help you with? I did mine by myself, but its better if you have someone helping you.

Stuart.
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Overdog
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Re: Fork cap leaking.

Post by Overdog »

Definitely have the front wheel off the ground...there will still be a bit of tension on the spring. Many folks have made a tool to get the caps back on...slotted PVC pipe etc. Pay close attention to where the threads on the cap begin to catch...it will make it easier to get the cap back on.
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roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
Contact:

Re: Fork cap leaking.

Post by roadwanderer2 »

Overdog wrote: Sun Oct 27, 2019 7:14 am Definitely have the front wheel off the ground...there will still be a bit of tension on the spring. Many folks have made a tool to get the caps back on...slotted PVC pipe etc. Pay close attention to where the threads on the cap begin to catch...it will make it easier to get the cap back on.
Your correct about having the front wheel off the ground, but the first thing you need to do is let all the air out of the forks first BEFORE you get the wheel off the ground, raise it as high as you can because once you release the pressure off the springs, the front end will drop a few inches, remove the airline that goes to the cap your removing, next and extremely important, make sure that you keep your face away from the caps while your loosening it because they WILL try to fly up. It's like taking apart a front coil spring on a strut assembly. Keep your hands on the caps so you don't lose it along with the metal washer that sits under it. DO NOT REMOVE THE SPRINGS.

Once you've replaced the cap seal, have a/your friend push down on the front wheel so the fork springs sink into the fork tubes. You'll still have some height of the springs sticking out of the fork tubes. This is where the socket comes into play . As your standing over the fork springs and tubes, (and this is the hard part), have your socket on top of the caps with a short 1/2 drive extension and ratchet handle, and while pressing the cap down onto the top of the tube, turn it at the same time to start the threads, make sure you have enough threads onto the cap so you can momentarily get the feeling back into your hands and wrists lol, again keeping your face out of the way just in case the cap flys off. Once you think you think you have enough treads on it, begin to tighten the cap down until it stops. Replace the airline and let your air suspension system refill the air that goes into your forks to their normal poundage, Slowly let the front of the bike back down onto the ground, check around the caps for any air or oil leaks. If everything is good, you should be good to go.

This is the exact way I replaced both fork spring caps on my GL1100, and after I replaced the air springs with progressive springs on the front of my GL1200.

I hope this helped you get your leaking cap problem solved.

Stuart, a.k.a. roadwanderer2.
chris22indy@att.net
Posts: 21
Joined: Tue Aug 28, 2018 7:30 am
Location: United States
Motorcycle: 1983 GL1100

Re: Fork cap leaking.

Post by chris22indy@att.net »

Thank you, I got it finished. Thanks again for your help.
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roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
Contact:

Re: Fork cap leaking.

Post by roadwanderer2 »

Glad to hear you got it done and your back on the road again. Ride safe.

Stuart, a.k.a. roadwanderer2.


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