Carb issues?


Information and questions on GL1000 Goldwings (1975-1979)
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goldwing1078
Posts: 5
Joined: Wed Apr 20, 2016 7:03 pm
Location: Redwood City, California
Motorcycle: 1978 GL1000

Carb issues?

Post by goldwing1078 » Wed Jun 26, 2019 11:01 pm



I’m on the verge of purchasing the Randakk Master Carb kit for my ’78 GL1000. It’s in the cart, along with the Degree Timing Wheel. Thought I’d throw this out and see if anyone had ideas about what else might be the problem. I had it tuned up pretty well, running nice. Then, after mostly sitting for a while, not so good. A buddy riding with me insisted on taking the lead because he couldn’t take the exhaust fumes. Unfortunately, I have a little corrosion crack or hole in the left side exhaust just behind the driver foot peg. It literally leaks gas, at least till it gets nice and warm (a little rich, ya think?). Also, liquid gas at the end of the pipe. Had a hard time keeping it running at all. A few adjustments and now it stays running if on the side stand. When I tilt it upright, it stalls out. Any ideas?



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DenverWinger
Posts: 921
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Carb issues?

Post by DenverWinger » Thu Jun 27, 2019 5:32 am

goldwing1078 wrote:
Wed Jun 26, 2019 11:01 pm
It literally leaks gas, at least till it gets nice and warm (a little rich, ya think?). Also, liquid gas at the end of the pipe.
I'd say that's pretty rich! :o Surprised you haven't hydrolocked it. My guess would be got some crud in one of the fuel inlet needle valves or a carb float that doesn't.

If it was running good before, I wouldn't get the Randakk kit quite yet, you might still be OK just servicing the floats and needles.

You might try this before pulling carbs: Loosen carb drain plugs on the "rich" side and drain all fuel from those two carbs. Then start her back up. If there was crud in a needle valve, the empty bowl and float at the bottom position might allow the inrush of fuel to flush the crud out of the needle valve. If still no joy then it's time to pull the carb rack and open up the carb bowls.

Put some gasoline in a jar and check all the floats (might find you have three floats and a "sink"). By this time you'll have things open enough visual clues should tell you whether or not to get the Randakk.

Clean up the needle valves and seats really good. Get some carb cleaner and spray thru all the jets and every other access hole or port you can get to from the bowls and put 'er back together.

Be sure to check/set float height before putting carb bowls back on. Should be some good pictures here or on Randakk site showing proper float setting for the 1000.

This might be just enough to get her purring proper again.
♫ 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

phoenixtubs
Posts: 47
Joined: Mon Jun 01, 2015 2:56 pm
Location: Chicago, IL
Motorcycle: 1985 Interstate
1987 VT700C Shadow
1978 GL 1000

Re: Carb issues?

Post by phoenixtubs » Thu Jun 27, 2019 8:33 am

When my 78 was leaking gas at the exhaust, I found gas pooling in the plenum. Have you checked that? Can be a hazardous situation. I ended up pulling the carbs and doing a complete rebuild with Randakk's Kit.

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virgilmobile
Posts: 8881
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: Carb issues?

Post by virgilmobile » Thu Jun 27, 2019 9:08 am

The gl1000..whew..I had one and when dialed in it would ruuuuuunnn.
I did have a few problems to overcome tho and one of them was the carbs.
They would start out ok but get really rich and puke out the engine...
I'd service them precise and for a few minutes they ran perfect..then get too rich again..
What I found was not a "rebuild" of the carbs but the floats themselves..There not included in the "kit".The fuel needle valves worked perfect and the float level was spot on.
I found that if I took a dried float and set it in a dish of gas it did float ok BUT after a few hours it started to sink in the bowl.After all night in the dish,the floats submersed at least 4mm.
This was my problem.The floats were absorbing fuel and sinking in the carb bowl and increasing the ammount of fuel in the carbs.
How I fixed this..
Dried the floats for a day... Dipped all 4 of them in a can of polyurethane to coat them and hung to dry for a hour..dipped them once more for good luck..Let them dry for 24 hours..
Reinstalled and set the float level by the book.
Absolutely fixed it.
Also the slides..Pay close attention to them.
They MUST move butter smooth and use a shop vac on the intake(operate the throttle) and verify each slide moves up and down with the throttle.
Pre-sync the carbs on the bench then vacuum sync on the bike at 1000 rpm...
If you can , upgrade the bike to electronic ignition and a electric fuel pump..

sfruechte
Posts: 214
Joined: Tue Mar 09, 2010 12:53 pm
Location: La Crosse, WI
Motorcycle: 1977 GL1000

Re: Carb issues?

Post by sfruechte » Sun Jul 14, 2019 6:33 am

Are you sure that is gas coming out your exhaust and not water vapor? Gas vaporizes at fairly low temperatures and it is normal for engines to create water vapor that condenses in the exhaust before warmup is complete.

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flyday58
Posts: 58
Joined: Tue Jan 08, 2019 1:10 am
Location: Cloudcroft NM
Motorcycle: 1976 GL1000
1976 GL1000 LTD
1981 CB750C
1997 BMW R1100RT
Couple of dirt bikes

Re: Carb issues?

Post by flyday58 » Sun Jul 14, 2019 9:25 am

virgilmobile wrote:
Thu Jun 27, 2019 9:08 am
The gl1000..whew..I had one and when dialed in it would ruuuuuunnn.
I did have a few problems to overcome tho and one of them was the carbs.
They would start out ok but get really rich and puke out the engine...
I'd service them precise and for a few minutes they ran perfect..then get too rich again..
What I found was not a "rebuild" of the carbs but the floats themselves..There not included in the "kit".The fuel needle valves worked perfect and the float level was spot on.
I found that if I took a dried float and set it in a dish of gas it did float ok BUT after a few hours it started to sink in the bowl.After all night in the dish,the floats submersed at least 4mm.
This was my problem.The floats were absorbing fuel and sinking in the carb bowl and increasing the ammount of fuel in the carbs.
How I fixed this..
Dried the floats for a day... Dipped all 4 of them in a can of polyurethane to coat them and hung to dry for a hour..dipped them once more for good luck..Let them dry for 24 hours..
Reinstalled and set the float level by the book.
Absolutely fixed it.
Also the slides..Pay close attention to them.
They MUST move butter smooth and use a shop vac on the intake(operate the throttle) and verify each slide moves up and down with the throttle.
Pre-sync the carbs on the bench then vacuum sync on the bike at 1000 rpm...
If you can , upgrade the bike to electronic ignition and a electric fuel pump..
That right there is brilliant troubleshooting, I don't care who you are! Thanks for this great tip. Easy fix for old sponges, er, floats.
"Who left the fridge open?" Tug Speedman

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virgilmobile
Posts: 8881
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: Carb issues?

Post by virgilmobile » Sun Jul 14, 2019 11:10 am

Thanks.
Not that hard once you think about it.

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DenverWinger
Posts: 921
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: Carb issues?

Post by DenverWinger » Sun Jul 14, 2019 12:27 pm

"Sinks" and "Sponges" belong in the kitchen, not carburetor bowls. :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

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