1977 GL 1000 carb top question


Information and questions on GL1000 Goldwings (1975-1979)
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maintainer
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1977 GL 1000 carb top question

Postby maintainer » Tue Aug 25, 2015 7:03 am



Are the plastic cap "buttons" on top of the carbs important?
Can they be purchased anywhere?
I have a weathered and broken one.


1982 GL 1100 Interstate SOLD
1977 GL 1000 Standard (naked can be good, who knew?)

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dingdong
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Re: 1977 GL 1000 carb top question

Postby dingdong » Tue Aug 25, 2015 8:37 am

Yes they are important. The slides won't work properly if broken. Check this link for repair info. http://www.wingovations.com/carburettor ... 4579471075

Tom
Tom

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maintainer
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Re: 1977 GL 1000 carb top question

Postby maintainer » Tue Aug 25, 2015 9:39 am

dingdong wrote:Yes they are important. The slides won't work properly if broken. Check this link for repair info. http://www.wingovations.com/carburettor ... 4579471075

Tom


Yes thanks, I did a little online research and found this about the GL 1000 on Steve Saunders Goldwing Facts:

A particular issue is the plastic buttons in the carburetor tops; these were built in to the top of the vacuum chamber during manufacture and cannot be replaced. They do tend to fail, and the usual fix is to epoxy something on top. A good seal is vital for proper vacuum operation
1982 GL 1100 Interstate SOLD
1977 GL 1000 Standard (naked can be good, who knew?)

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spiralout
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Re: 1977 GL 1000 carb top question

Postby spiralout » Tue Aug 25, 2015 10:56 am

dingdong wrote:Yes they are important. The slides won't work properly if broken. Check this link for repair info. http://www.wingovations.com/carburettor ... 4579471075

Tom

I was under the impression that those are just dress up caps to be placed over the old uglied up original caps, not a repair for broken ones.

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Re: 1977 GL 1000 carb top question

Postby WingAdmin » Tue Aug 25, 2015 12:17 pm

spiralout wrote:
dingdong wrote:Yes they are important. The slides won't work properly if broken. Check this link for repair info. http://www.wingovations.com/carburettor ... 4579471075

Tom

I was under the impression that those are just dress up caps to be placed over the old uglied up original caps, not a repair for broken ones.


Correct - the Wingovations products in the link above are cosmetic only.

As far as I know the only place offering true replacements is Pistol Pete's, at http://www.oldwings.com - you have to send the carb tops to them for them to be installed, and the price is $25.00 each or $80.00 for four.


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Re: 1977 GL 1000 carb top question

Postby dingdong » Wed Aug 26, 2015 7:05 am

Well, learned something new today. I thought those were repair tops. Sorry!

Tom
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Re: 1977 GL 1000 carb top question

Postby sfruechte » Tue Sep 01, 2015 2:18 pm

There doesn't seem to be any vacuum leak when a carb top is compromised. How does it impact vacuum or function?

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Re: 1977 GL 1000 carb top question

Postby spiralout » Tue Sep 01, 2015 3:29 pm

sfruechte wrote:There doesn't seem to be any vacuum leak when a carb top is compromised. How does it impact vacuum or function?

When a cap button is compromised, you lose vacuum to the top of the slide, which is what causes them to rise. There's a passage in the button that transfers the vac from the bore to the underside of the cap. This is the best pic example I have on this PC

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Re: 1977 GL 1000 carb top question

Postby ct1500 » Tue Sep 01, 2015 8:30 pm

sfruechte wrote:There doesn't seem to be any vacuum leak when a carb top is compromised. How does it impact vacuum or function?


Carb slides only move or open with a sufficient carb venturi vacuum and not a manifold vacuum at idle below the throttle plates.
This is what I do
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Re: 1977 GL 1000 carb top question

Postby SnoBrdr » Thu Sep 03, 2015 1:48 pm

spiralout wrote:
sfruechte wrote:There doesn't seem to be any vacuum leak when a carb top is compromised. How does it impact vacuum or function?

When a cap button is compromised, you lose vacuum to the top of the slide, which is what causes them to rise. There's a passage in the button that transfers the vac from the bore to the underside of the cap. This is the best pic example I have on this PC
carb_c.jpg


So they just degrade over time, become brittle ad break?

I had to replace one 2 years ago.

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Re: 1977 GL 1000 carb top question

Postby TKM51 » Fri Sep 04, 2015 4:08 am

Good morning
I saw a rack a good while ago with Molson Canadian beer caps epoxied on . The fellow said it was his fix for a broken button ,said they worked well and looked good---I am sure other caps would also do the trick
Terry

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Re: 1977 GL 1000 carb top question

Postby RBGERSON » Thu Sep 10, 2015 8:08 am

You have to be careful there is a vacuum/air hole at the edge of the cap that must remain open


HAD LOTS OF GOLDWING 75-83
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