carbs and fuel pump


Information and questions on GL1000 Goldwings (1975-1979)
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JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
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carbs and fuel pump

Postby JellyBelly » Tue Mar 26, 2013 12:45 pm



So i rebuilt the carbs on the 77. The local autozone didn't have a vacuum guage for me to borrow so i went ahead and installed the carbs. They are flooding on 1 and three and leaking somewhere...I'll check that out.

My problem is the fuel pump. I have fuel squirting out what I'm assuming are two breather holes. Is this a damaged diaphragm? I read the whole assembly has to be replaced if this is the case. Is that true? And could there bebebe another problem. I don't want to replace the pump if maybe there is a different problem. I took it appart and it waswas dirty and had small rust pieces in there but a visual inpection it looked ok...i know that doeant really mean anything.

Thanks in advance.


I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: carbs and fuel pump

Postby virgilmobile » Tue Mar 26, 2013 2:24 pm

Do a little research for gl1000 fuel pump rebuild kit.
If this ends in no results,it can be substituted with a electric pump.Search that too.
As far as the carbs....be aware of one thing....The composite floats can "water log" and sink in the fuel,leaving the needle unsealed and overflowing the carb.....
As a habit....when I find a composite float,I replace them with a new plastic one or dip them in polyurethane a few times to seal them.

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: carbs and fuel pump

Postby virgilmobile » Tue Mar 26, 2013 2:33 pm

By the way...when you have the carbs out for service....you can fill them with gas to check for leaks by draining gas from a can 4-6 foot above the carbs....This creates around 2.5 psi of pressure like the pump.Then drain each carb and measure the amount of fuel....It's a easy way to check float level....They all should have the same amount of fuel in each carb
Do a mechanical sync on the throttle valves and then use your shop vac on each one to test the slide action.They do have a tendency to stick.

It's easier to see and repair these problems before they show up on the bike.

User avatar
JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: carbs and fuel pump

Postby JellyBelly » Tue Mar 26, 2013 2:45 pm

No rebuild kit for the 77 fuel pump. I know Randall used to offer an electric but I don't see it anymore. And since I'm probably going to sell the bike when it is running properly I will probably just buy a replacement one for about $100 since that is the cheaper option.
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

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virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: carbs and fuel pump

Postby virgilmobile » Tue Mar 26, 2013 2:53 pm

Do a little looking in the search section.I remember a fuel pump from a Honda Prelude may work.reasonably priced too.

User avatar
JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: carbs and fuel pump

Postby JellyBelly » Tue Mar 26, 2013 3:09 pm

Just for fun I took the fuel pump off the 78 and put it on the 77. I thought maybe it was pushing too much fuel through to the carbs. Still have fuel leaking from carbs but the fuel pump worked fine.

Maybe I'll get an electric pump for my 78 and use the old 78 pump on the 77.
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

User avatar
JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: carbs and fuel pump

Postby JellyBelly » Tue Mar 26, 2013 3:10 pm

virgilmobile wrote:By the way...when you have the carbs out for service....you can fill them with gas to check for leaks by draining gas from a can 4-6 foot above the carbs....This creates around 2.5 psi of pressure like the pump.Then drain each carb and measure the amount of fuel....It's a easy way to check float level....They all should have the same amount of fuel in each carb
Do a mechanical sync on the throttle valves and then use your shop vac on each one to test the slide action.They do have a tendency to stick.

It's easier to see and repair these problems before they show up on the bike.




Great tips. Thanks for that
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

User avatar
JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: carbs and fuel pump

Postby JellyBelly » Tue Mar 26, 2013 3:26 pm

This looks like a good deal. $40 and Keep old pump on for looks.

http://www.jtoutfitters.com/volt-electr ... 10765.html
I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie

User avatar
virgilmobile
Posts: 7650
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: carbs and fuel pump

Postby virgilmobile » Tue Mar 26, 2013 3:41 pm

That's what I used on my 78....Rubber mount it if possible....it is a pulse type so there is a bit of thumping noise...I removed my leaking pump and cut a piece of 1/8" aluminum to cover the hole..A blank plate.
Using the ignition feed wire seemed to put a bit of unwanted load on the circuit.....
So I used a relay operated by the kill switch and powered it from a fused battery line..Otherwise the pump runs all the time the key on and the kill switch is on.

Here's a post about the floats too....viewtopic.php?f=4&t=4776

User avatar
JellyBelly
Posts: 181
Joined: Mon Apr 23, 2012 8:39 am
Location: Southaven, MS
Motorcycle: 2000 Valkyrie GL1500
1978 GL1000 cafe racer (sold)
1977 GL1000 (sold)
1976 GL1000 (parting out)
1985 KZ550 (sold)
2006 CFMoto V5 (sold)
Contact:

Re: carbs and fuel pump

Postby JellyBelly » Tue Apr 02, 2013 2:59 pm

Installed new fuel pump. Found my carb fuel leak...some bozo (me) didn't screw the carbs on tight...duh!
Just need to sync and see how she rides.


I love my wings (both Hot and Gold) - check out my blog @ http://wingthing1000.blogspot.com/

Former 76, 77, and 78 GL1000 owner...Upgraded to a Chromed out Valkyrie


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