79gl1000 carb issues im new to bikes


Information and questions on GL1000 Goldwings (1975-1979)
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jhuston
Posts: 6
Joined: Fri May 20, 2011 10:09 am
Location: columbus,ohio
Motorcycle: 79 gl1000

79gl1000 carb issues im new to bikes

Postby jhuston » Fri May 20, 2011 10:20 am



Im new to bikes but just picked up a 79 gl1000 it has sat for 3 years i removed the carbs and cleaned them installed new o rings and gaskets re installed them it does fire up now unlike before if u put it at about half throttle and the plentum is filling up with fuel i don't know if the float is sticking in the carbs causing it to flow out into the plentum im a heavy equipment and diesel truck mechanic i don't know much about carbs



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virgilmobile
Posts: 7663
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: 79gl1000 carb issues im new to bikes

Postby virgilmobile » Fri May 20, 2011 10:50 am

Stuck open float will fill the plenum with gas.When rebuilding you should(at least) pull the needle valve,seat and screen,floats and clean them.Verify float level and operation.Internet search will result in many 'how to' rebuild carb articles.The 1000 has it's quirks,but this site deals with them very well.

jhuston
Posts: 6
Joined: Fri May 20, 2011 10:09 am
Location: columbus,ohio
Motorcycle: 79 gl1000

Re: 79gl1000 carb issues im new to bikes

Postby jhuston » Fri May 20, 2011 11:41 am

Thanks I did replace needle and seat valve and blew compressor air through every passage in the carbs so I'm sort of leaning towards the float level but is there a certain procedure on setting them

TheArtist
Posts: 70
Joined: Fri Apr 08, 2011 1:13 pm
Location: dell rapids
Motorcycle: 1979 GL 1000

Re: 79gl1000 carb issues im new to bikes

Postby TheArtist » Fri May 20, 2011 11:42 am

I just rebuilt mine and they all were frozen solid. I worked them loose before driving out the pins. I used a torch tip cleaner to clean the float hinge and sanded the pin with fine sandpaper. If you go thru the trouble of taking them off, you might as well do the rebuild right. Then that is one less problem.

jhuston
Posts: 6
Joined: Fri May 20, 2011 10:09 am
Location: columbus,ohio
Motorcycle: 79 gl1000

Re: 79gl1000 carb issues im new to bikes

Postby jhuston » Fri May 20, 2011 11:49 am

I did clean up the pins with a piece of sandpaper but never thought about the torch tip cleaners thanks will have to try that

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virgilmobile
Posts: 7663
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: 79gl1000 carb issues im new to bikes

Postby virgilmobile » Fri May 20, 2011 12:00 pm

You can check the float level.I don't know the measurement off the top of my head,but they are measured with the carb vertical,tilt the carb back and forth.It is measured with the float RESTING on the needle NOT compressing it's spring.If I remember,I set the floats so they were level with the carb body.I also found that the floats would absorb gas, sink in the bowl and flood the cylinder.I fixed that by coating the float with Polyurethane. 2 coats.

Side note::Yes,30 year old composite floats can get 'water logged'.And I hate to admit it ,but in a hurry I actually put 2 floats in upside down.Well it fit but didn't work. :oops:

jhuston
Posts: 6
Joined: Fri May 20, 2011 10:09 am
Location: columbus,ohio
Motorcycle: 79 gl1000

Re: 79gl1000 carb issues im new to bikes

Postby jhuston » Fri May 20, 2011 12:36 pm

and also what is the air cut off and what does it look like and also where is it located I heard from a few mechanics I work with that they are known to act up and cause bike to run poorly

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virgilmobile
Posts: 7663
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: 79gl1000 carb issues im new to bikes

Postby virgilmobile » Fri May 20, 2011 12:44 pm

The 1000 has one air cutoff valve.It's under 3 screws on the plenum box,about the size of a half dollar.Be careful.it's got a healthy spring in there and a smalllll 'O' ring.It's purpose in life is to en-richen the fuel mixture during deceleration to prevent a lean fuel mixture.If the diaphragm is OK,then just clean it and the bore so it slides smooth.Be absolutely sure that the main slides on top do not drag at all in the cap.Do not oil the slides either.

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: 79gl1000 carb issues im new to bikes

Postby scotterichmond » Fri May 20, 2011 1:22 pm

Here is a good site with more info than you can absorb in one day !

http://randakks.com/

jhuston
Posts: 6
Joined: Fri May 20, 2011 10:09 am
Location: columbus,ohio
Motorcycle: 79 gl1000

Re: 79gl1000 carb issues im new to bikes

Postby jhuston » Mon May 23, 2011 1:41 am

great guys big improvement now just needs syncronized which im getting mixed signals about how hard it is to do that i watched my dad do a kz 750 when i was younger and it looked a bit confusing but i was like 10 years old so very long time ago but when i got it running it started spraying the fuel out of the weep hole on the pump are those rebuildable too or will it need replaced???

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scotterichmond
Posts: 613
Joined: Fri May 06, 2011 3:49 pm
Location: Marblemount,wa
Motorcycle: 1975 GL1000
[img]http://images.goldwingdocs.com/scotterichmond_32376/Modestly_restored_1975_GL1000_750/engine_repainted_even_new_embl_3919.jpg[/img]

Re: 79gl1000 carb issues im new to bikes

Postby scotterichmond » Mon May 23, 2011 9:40 am

If you can find parts they are rebuildable. A lot of guys go electric, I prefer to stay with all stock setups ( including points)

TKM
Posts: 66
Joined: Mon Jul 27, 2009 5:57 pm
Location: Brockville Ontario
Motorcycle: 1976-GL 1000-
1978 GL 1000-rolling frame
1979 GL 1000-
1982 GL 1100A-
1999 Valkyrie
1974 TR6

Re: 79gl1000 carb issues im new to bikes

Postby TKM » Thu May 26, 2011 3:28 pm

scotterichmond wrote:Here is a good site with more info than you can absorb in one day !

http://randakks.com/

aftermarket needles and seats often leak , floats improperly set often leak--Like scotterichmond says read Randakks site for tech tips , he sells a rebuild kit and video which is second to none
Enjoy your new to you bike , don't forget to change the timing belts

Terry




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