Honda GL1100 interstate rebuild


Information and questions on GL1100 Goldwings (1980-1983)
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GL1100interstate
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Location: SeaTac washington
Motorcycle: 1983 GL1100 Interstate

Honda GL1100 interstate rebuild

Post by GL1100interstate » Tue Feb 04, 2020 10:25 pm



I need help with a few things. I am trying to restore a 1983 Honda GL1100 interstate. It’s been sitting for about 13 years. The carburetors are pitted and I can’t find any replacements anywhere! If someone has some, I will buy it. Or if someone knows where I can get one from a trusted source that would be great. I want to get this bike running again, it was my dads and I don’t want to see it sit and rot anymore. Also, how in the heck do I remove the gas tank without dropping the whole back end of the bike? This is going to be a hard but fun project, but some insight would be great.



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WingAdmin
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Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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Re: Honda GL1100 interstate rebuild

Post by WingAdmin » Thu Feb 06, 2020 10:10 am

GL1100interstate wrote:
Tue Feb 04, 2020 10:25 pm
Also, how in the heck do I remove the gas tank without dropping the whole back end of the bike? This is going to be a hard but fun project, but some insight would be great.
The short answer is...you can't. To remove the gas tank, you have to remove the rear wheel and swingarm first. Then the tank pulls out from the back, as you have surmised.

GL1100interstate
Posts: 5
Joined: Tue Feb 04, 2020 10:14 pm
Location: SeaTac washington
Motorcycle: 1983 GL1100 Interstate

Re: Honda GL1100 interstate rebuild

Post by GL1100interstate » Thu Feb 06, 2020 10:13 am

Okay thank you. Do you know if the 1981 model is compatible with my 1983?

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Wilcoy02
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Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Honda GL1100 interstate rebuild

Post by Wilcoy02 » Thu Feb 06, 2020 7:01 pm

Most 80 - 83 gl1100 parts are interchangeable.

The aspencade is the exception.
Look above any page on this forum and click on manuals. The part numbers will tell you if they are interchangeable.

And yes the gas tank comes out of the back end.

GL1100interstate
Posts: 5
Joined: Tue Feb 04, 2020 10:14 pm
Location: SeaTac washington
Motorcycle: 1983 GL1100 Interstate

Re: Honda GL1100 interstate rebuild

Post by GL1100interstate » Thu Feb 06, 2020 7:05 pm

Awesome! Thank you. With a bike that’s been sitting for this long do you think I will need to rebuild the motor? It’s always been under cover

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Wilcoy02
Posts: 1088
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Honda GL1100 interstate rebuild

Post by Wilcoy02 » Thu Feb 06, 2020 9:46 pm

The motor probably is in good shape. Turn the engine over by hand to check. Pull the back cover off and use a 17mm socket to rotate the engine. Definitely replace the timing belts before you even attempt to turn it over with the starter. then write the date and miles on the inside belt cover.

GL1100interstate
Posts: 5
Joined: Tue Feb 04, 2020 10:14 pm
Location: SeaTac washington
Motorcycle: 1983 GL1100 Interstate

Re: Honda GL1100 interstate rebuild

Post by GL1100interstate » Thu Feb 06, 2020 11:01 pm

Would the transmission need any work?

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Wilcoy02
Posts: 1088
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Honda GL1100 interstate rebuild

Post by Wilcoy02 » Thu Feb 06, 2020 11:56 pm

Probably not. The pumpkin ball will need drained and refilled.

After you get it running, pour 1/2 can of sea foam in the oil ride it about 100 miles and while hot, drain out the oil and change filter and add oil. Pour the other half of sea foam in the gas tank with fresh gas.

I run my 1100 with 4-6 oz of atf in every other tank of gas.

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newday777
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1983 GL1100A Wineberry 36,000 miles

1975 CB750 K5 Planet Blue 7,800 miles

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Re: Honda GL1100 interstate rebuild

Post by newday777 » Mon Feb 10, 2020 11:00 am

As to the carbs...82 and 83 are the same. Do Not buy 80/81 carbs for it(they have pressed in jets rather than screw in jets).
If the gas tank is not leaking you can de-rust it using the electrolysis cleaning method without removing the tank.



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