'86 GW Interstate Project Bike


Information and questions on GL1200 Goldwings (1984-1987)
Smartin
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'86 GW Interstate Project Bike

Post by Smartin »



Hello everyone In March of 2017 I joined this site because I was about to pick up my "new to me" GoldWing, a 1986 Interstate with 25000 miles. I received a lot of good advice on how to proceed with my project, unfortunately, as does so often happen, life reared it's sometimes ugly head and I had to put the Wing on the back burner. Well I finally got back at it...

This is what it looked like the day I got her home...




And this is now...







Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

This is what the tank looked like then...UGLY!!!


And now, After a crapton of vinegar... A little less ugly...


This is what came out in the wash...



Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

A few more before pics...







Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Started rebuilding the carbs yesterday.






And found a couple bad diaphragms.


Any ideas on where I can get some new carb diaphragms? Randakks doesn't have any, ebay has them in the UK and China. Do you think the Chinese ones are OK?

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dingdong
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Re: '86 GW Interstate Project Bike

Post by dingdong »

The diaphragms are no longer available from Honda but here is a link to a company that makes replacement diaphragms for carbs. These are just the rubber diaphragms not the complete slide assembly. I, just last month, put these on my gl1500. So far they work great. You have to be very careful and fast when gluing them on the slide as the superglue gel sets up pretty fast. Also there are complete slides available from SaberCycle but they DON'T work because the diaphragms are too thick. Just a warning in case you happen across them. Good luck with your rebuild.

http://jbmindustries.com/Keihin_diaphragm.html

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Thanks dingdong, very informative site, looks like they have what I need...

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Carb #3 had a some green slime in it. Here is a pic of a stain it left in the float bowl.


Any ideas what may have caused that?

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WingAdmin
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Re: '86 GW Interstate Project Bike

Post by WingAdmin »

I've seen it as a result of ethanol-induced corrosion of brass/copper fittings and jets.

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Ok, Thanks... I got as much of it off as I could using steel wool, should be good to go...

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Got my new carb diaphragms today, now i just need to figure out how to attach them to the slides...





Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

The old one is on the left, new on the right.


Old on top of new.


The new one appears to have a smaller diameter hole for the slide, I'm assuming because the old one is aged and less pliable and got stretched when I removed it from the slide...

The trick is getting the bead on the diaphragm stuffed into the tiny space between the tan plastic rings on the slide.




I ended up carefully using my thumbnail, slowly working my way around the slide and it seems to have worked pretty well. And I only had to do it twice to get the hole at the bottom of the slide to line up with the hole on the tab at the large end of the diaphragm.


The first time it moved as I was stuffing it in...

Looks just like brand new rebuilt.



Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Are the rubber boots between the carb and the intake tubes removable? Or are they permanently attached?

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DenverWinger
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Re: '86 GW Interstate Project Bike

Post by DenverWinger »

Removable, Heat them up some to soften the rubber, it is old and hard. Maybe boil them... :lol:
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Thanks Denver, I should have been clearer, I have them off the carb, but do they come off of the intake tube?
I found some info on soaking them in a mixture consisting of oil of wintergreen, which will be here on Wednesday, and xylene to soften and renew the rubber cuz they are hard as iron. But the state of California has deemed that it's residents aren't capable of using xylene in a safe, sane and ecological manner, so it is unavailable here. Some people have had similar results by substituting isopropyl alcohol for the xylene, so I'm gonna give that a try.

I cleaned up the plenum a little yesterday.
Before:


After:




It came out OK...

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DenverWinger
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Re: '86 GW Interstate Project Bike

Post by DenverWinger »

Parts fiche doesn't show the rubber couplers as separate parts so leads me to believe they are not readily removable from the intake tubes. Any reason why?

Nice and Shiny plenum you got there.... :D
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

I just thought i should take them off before I soaked them, But I guess that's not gonna happen.
Thanks Denver...
What's the consensus here on painting carbs? I cleaned them up the best I could, but they still look kinda ratty on the outside. It's like the aluminum is stained from something.

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

LOL... Here's the correct "before" pic of the plenum from my post on 09/16/19. It appears I need to get a proofreader...



Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Was that supposed to go inside the carb?


Anyone up for a guessing game?
OK, here we go... Four carbs to rebuild on a GW1200, right? I'm reassembling the 4th one, just finished screwing the top cap on, I look down and the giant spring is laying on the workbench... #*&@!*...
So who can guess how many times that happened out of the 4 carbs? Winners get a big ATTABOY... One guess per member...

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DenverWinger
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Re: '86 GW Interstate Project Bike

Post by DenverWinger »

I'll bite - all four of them, right? :shock: :shock: :shock:
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Nope, but close. 3 out of the 4...

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

I can't find one of these on ebay. It's the rubber purge control valve holder for my '86 GL1200. Anyone have an idea where I might find one?
Attachments



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trike lady
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Re: '86 GW Interstate Project Bike

Post by trike lady »

I.M.B.B.A. Technician II Certified

Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

trike lady, Thanks for sharing those two sites. This is the part I'm needing, part # 17451-MG9-642, shown as Item 14...
https://www.motosport.com/cruiser/oem-p ... tion-valve

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Rambozo
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Re: '86 GW Interstate Project Bike

Post by Rambozo »


Smartin
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Re: '86 GW Interstate Project Bike

Post by Smartin »

Rambozo, That's the one!!! Thank you very much. So, what did I just learn? Put in the OEM part # when searching for parts, that's what. Thanks for taking the time to do that...



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