1980 honda goldwing 1100 carb sync


Information and questions on GL1100 Goldwings (1980-1983)
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golfthis1123
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1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Tue Apr 23, 2013 6:30 pm



Hi everyone my name is Kasey and i recently purchased a 1980 honda goldwing that hasn't been rode in about 6 years. The guy i got it from said that the carbs were frozen. I took the carbs apart and ultra sonic cleaned them and bought new gaskets and diaphragms. I put everything back together and it starts up no problem with the choke on. After it warms up and you turn the choke off it wont idle it just dies unless you give it some throttle then it stays running. I havnt had the carbs sync yet i was just wondering if it has to be idling in order to sync the carbs. It has a cruise control switch so i don't know if i should set the cruise at the lowest rpms it will stay running and sync it from there or what. If anyone has any help they are willing to share i would be very greatful. Thanks



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80-GL100-INT
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Re: 1980 honda goldwing 1100 carb sync

Postby 80-GL100-INT » Tue Apr 23, 2013 9:05 pm

I'm kinda having the same problem. I read in the carb rebuild info to bench sync them, which is what I'm getting ready to do tomorrow. I'm waiting on my gauges.

I do know from past experience that even my ultrasonic cleaner can still miss one of those many tight tiny little passages in a carb body. especially on one that has set for awhile. That stuff can harden like concrete.
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Re: 1980 honda goldwing 1100 carb sync

Postby tunaboy » Wed Apr 24, 2013 6:52 am

I know that this is a dumb answer but have you adjusted the idle screw? I just got my carbs back on they were bench synced. They were very close to being spot on.

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Wed Apr 24, 2013 1:48 pm

Actually what ever reason I didn't think about messing with that. I am going to mess with it some more tonight and see what happens I will let you guys know if it works. Does the idle need to be at a certain rpm I should I just set it to where it stays running?

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trashtruck
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Re: 1980 honda goldwing 1100 carb sync

Postby trashtruck » Wed Apr 24, 2013 2:52 pm

idle set @ 950 rpm +/- 100.
WHAT IS THE SPEED OF DARK?

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Wed Apr 24, 2013 4:32 pm

That's what I thought, when I hold the throttle it has to be around 1500 rpms for it to stay running so not real sure what I need to do I'm going to try to bench sync the carbs again I guess then see If that does anything. Does the bike need to be at an idle to sync the carbs with vaccumm gauges.

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trashtruck
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Re: 1980 honda goldwing 1100 carb sync

Postby trashtruck » Wed Apr 24, 2013 7:24 pm

in order for the carb sync to mean anything, the carbs have to be clean, clean, clean. carb sync is one of the last steps to a good tune. you bought new gaskets and diaphram, from where? if not oem or from randakk, aftermarket parts are a crap shoot as to weather they are good or not. an ultrasonic cleaning is probably not enough. there are many small air passages that must be clean in order to get a good idle. you may have to let them sit in a container of seafoam over night and try boiling a pot of water, remove from heat, insert carb and let cool. that's been known to loosen up some pretty nasty stuff. you may need to do this 2 or 3 or 4 times. then try bench syncing.
WHAT IS THE SPEED OF DARK?

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Wed Apr 24, 2013 8:13 pm

Thanks trashtruck thats kind of what i figured the carbs need cleaned better bet didn't want to have to take apart the carbs again. As far as the gaskets and diaphragms go I got the set from Randak cycle shop. Should i do both put the carb in seafoam and in boiling water or do you think just putting the carbs in boiling water a few times and letting the jets soak in some seafoam over night would work. I dont want to have to buy a lot of seafoam to let my carbs set in (i guess i dont really know how much i would need to let them soak in seafoam either). I am going to take the carb back off tomorrow and take it apart and try putting it in boiling water and hopefully that works. If anyone knows of any tips or tricks in using boiling water let me know, i've never done it before and im open for suggestions. Thanks again to everyone who has been responding its been very helpful.

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Re: 1980 honda goldwing 1100 carb sync

Postby Fulcrum » Wed Apr 24, 2013 8:46 pm

Only going from my own experience..... Fisrt thing I would do is set the idle screw to maintain idle. Simple things first! Now if you are not confident with your cleaning then as you have already done it once it should be pretty simple the second time. Question, did you remove all the jets and needles when you cleaned the carbs? If not you probably need to. I removed them and soaked them in a solution of carb cleaner overnight. Then I used tooth pics to clear out all the little orifices and used more carb cleaner direct from the can and compressed air to clean everything out. For dipping an entire carb I used a 50/50 mix of Pine Sol and water, works like a champ. Just dont use it on any painted parts, but it is safe for rubber and some plastic parts. Bench synching is super easy, I used the thread on Ngwclub.com I think for this. But fist off I would adjust the idle screw. If you are not sure which it is, from the right side of the bike it is the flathead screw at the bottom of the linkage that links between the #3 and #4 carbs. I guess I can post a pic, brb... lol

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trashtruck
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Re: 1980 honda goldwing 1100 carb sync

Postby trashtruck » Wed Apr 24, 2013 8:51 pm

start the bike up and get it to operating temp. with the bike running, close the fuel valve at the tank and remove the fuel line. insert fuel line into container of seafoam and let the fuel pump put the seafoam into the carbs. when the bike stalls, cause it cant run on pure seafoam, turn bike off, reconnect fuel line and let it sit 24/48 hrs. drain seafoam from carbs thru drain screws on bottom of carbs and open fuel valve and give the carbs some gas. if this doesnt clear up the problem, then you can boil. just for pease of mind, remove the rubber parts from the carbs before you boil. some folks like to use a 50/50 mix of water and pinesol.
WHAT IS THE SPEED OF DARK?

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Fulcrum
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Re: 1980 honda goldwing 1100 carb sync

Postby Fulcrum » Wed Apr 24, 2013 8:57 pm

The idle screw is what the red shaft of the screwdriver is touching. Hope this helps.
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trashtruck
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Re: 1980 honda goldwing 1100 carb sync

Postby trashtruck » Wed Apr 24, 2013 9:00 pm

apparently, fulcrum can type faster than me.
WHAT IS THE SPEED OF DARK?

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Re: 1980 honda goldwing 1100 carb sync

Postby Fulcrum » Wed Apr 24, 2013 9:14 pm

trashtruck wrote:apparently, fulcrum can type faster than me.


Thats what "she" said. LOL

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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Thu Apr 25, 2013 5:14 am

When I cleaned the carbs the first time I took everything apart on them including the jets. I tried turning the idle screw all the way in and still wouldn't idle. I am going to try to get it running then put the fuel line in seafoam and see if that helps free anything up and if that doesn't work I guess I will try to take the carbs apart and boil them. Should one can of seafoam be plenty for the fuel pump to suck into the carbs or do you guys think I would need more.

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Thu Apr 25, 2013 6:45 am

This may be a stupid question but will that seafoam stuff ruin any if the gaskets inside the carb when I let it sit in there for a day or two. I'm not very familiar with seafoam just herd of it from a buddy and on this forum.

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trashtruck
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Re: 1980 honda goldwing 1100 carb sync

Postby trashtruck » Thu Apr 25, 2013 2:21 pm

i've never heard of seafoam damaging gaskets. you only need enough seafoam to fill the bowls and get up into the jets, should only be a few oz. if that doesnt work, you'll have to dissasemble and clean some more.
WHAT IS THE SPEED OF DARK?

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Thu Apr 25, 2013 2:28 pm

Ok thanks I didn't think it would damage them but just wanted to double check I'm going to let it sit in the carbs tonight and maybe tomorrow night ill let you guys know what happens Friday or Saturday

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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Thu Apr 25, 2013 7:05 pm

I let the bike run for a while to get to operating temp and noticed that on the right side it acts like its back firing you can feel it on the right side of the exhaust kind of puttering the left side feels normal I didn't know if there is a way to fix that or what. I filled the carbs up with sea foam going to let it sit over night and drain it tomorrow evening.

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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Sat Apr 27, 2013 8:21 am

I drained the carbs of seafoam then started the bike and it did sound a little bet better and did idle at a much lower idle speed around 1500. It's still backfiring on the right side of the bike it's not a real bad back fire but it's there. If you feel the valve covers they all feel the same temp by feel and all the cylinders are firing to. So I don't know if the valves need adjusted on the right side or what. And I'm not sure what the specs for the valves need to be either. Also I don't know if the back firing could be from the carbs also either. Last night after I drained it I let it run within regular gas for awhile then just let it run on seafoam until it died. So I'm going to let it set in there till Monday and see if that improves anything. Let me know what you guys think please.

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Re: 1980 honda goldwing 1100 carb sync

Postby SteveB123 » Sat Apr 27, 2013 8:43 am

golfthis1123 wrote: So I don't know if the valves need adjusted on the right side or what. And I'm not sure what the specs for the valves need to be either. Also I don't know if the back firing could be from the carbs also either.


Stop.

Valve adjustment affects cylinder breathing.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Sat Apr 27, 2013 10:08 am

Ok so does that mean that the back firing has nothing to do with the valves then.

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Re: 1980 honda goldwing 1100 carb sync

Postby SteveB123 » Sat Apr 27, 2013 10:28 am

golfthis1123 wrote:Ok so does that mean that the back firing has nothing to do with the valves then.


No, that means you're chasing your tail trying to sync carbs on an engine whose valves aren't adjusted.
Mis-adjusted valves means every cylinder is breathing differently. Trying to force it to breathe the same by adjusting the carbs is a fools errand. Since you've posted and asked for help, you're obviously no fool.

Think of it like this:
Individual carbs on each cylinder effectively means you have four individual engines on a common crankshaft. Each cylinder must have equal cylinder filling and emptying (breathing though the valves) to produce the same amount of power. The first step to achieving that is having all the valves adjusted correctly. Then you correct any minor differences with throttle blade adjustments (carb sync).

HTH.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Sat Apr 27, 2013 11:27 am

Ok thanks I will try to find the specs online and try to adjust the valves this weekend and see if that does anything. Thank you, I greatly appreciate it.

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SteveB123
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Re: 1980 honda goldwing 1100 carb sync

Postby SteveB123 » Sat Apr 27, 2013 11:44 am

golfthis1123 wrote:Ok thanks I will try to find the specs online and try to adjust the valves this weekend and see if that does anything. Thank you, I greatly appreciate it.


Scroll to the top of the page, "How-To Articles", drop down 1100's. It's there.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

golfthis1123
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Re: 1980 honda goldwing 1100 carb sync

Postby golfthis1123 » Sat May 04, 2013 5:38 pm

I was adjusting the valves today and notice the the cam for the rocker arms for the valve might be off a bit. It only looks like it might be on the right side. I was wondering how do you reset the timing or how do you know where to adjust it to to make it right. I didn't know if there is a notch you have to line up or what.




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