Carb rebuild 84 1200 interstate


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Carb rebuild 84 1200 interstate

Postby poffutt » Wed Feb 22, 2012 1:48 pm



My 84 interstate has not been on the road since 1991 (21 yrs) Wow! She starts up (even more WOW!!!) she idles but reves very slow. I know I am getting the Carbs rebuilt.

Questions:

I have always worked on my own cars. ( R&R waterpumps, alt, radiators, even replace an AC compressor, dryer and hoses.) Never have I tackled a Carborator much less 4 of them.
1. How hard is this job? should I tackel this myself?
2. If I do tackel this, what would be my best source of instructions?
3. If I have a shop do it, what would I expect to pay approx?
4. I live in Houston TX, does anybody know of a good shop that will do them?
4. Can they be syncronized before I install them on the bike?

Thanks for this site and all you Wingers out there.

Paul



User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Wed Feb 22, 2012 2:30 pm

"Never have I tackled a Carborator much less 4 of them."
Go for it..4 carbs is just a repeat of one.
" If I do tackel this, what would be my best source of instructions?"
Right here on the "how to" section and "search" area.
many of us "non-wrenchers" have tackled these carbs.
" If I have a shop do it, what would I expect to pay approx?"
The local "shop" just got a guy I know a bit over $300 just to clean his.A complete rebuild,assuming it really needs all the parts in the kit could cost 5-6 hundred.
"Can they be syncronized before I install them on the bike?"
yes,to some degree,however static syncing may not match your engine exactly.I prefer to set them close on the bench and "tune"them in on the bike.

Take it slow,take lot's of pictures and read all about them first.
The problem you describe usually is associated with stuck slides,which do not require a "kit" or a plugged up accelerator pump.
Here's a post about my 84 carb repairs.It now pulls like a freight train.No off idle rattle and gets 45 mpg.....viewtopic.php?f=5&t=9179
Last edited by virgilmobile on Wed Feb 22, 2012 2:44 pm, edited 1 time in total.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Wed Feb 22, 2012 2:44 pm

Thanks virgilmobile, I think you talked me into it. is ebay my best bet to get rebuild kits? Are there any brand kits you recomend?

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Wed Feb 22, 2012 3:03 pm

The only thing I'll say is not to buy from Saber Cycle.You can search under the "Vendors" tab above.

Actually,I've "rebuilt" my carbs on my 1000,two 1100,the 1200 and now the twin carbs on the 1500.
So far I've only needed some "O" rings,and I got them at NAPA.
I'm never in a hurry,so I don't order anything till I'm sure I need it.Especially when the "kits" can cost $50 per carb.
I would tend to replace the pivot pins,jets and othe parts in the kit only when necessary,like when they are corroded or damaged.So far it's been just delicate clean,polish,then clean some more.
The 84 gl1200 carbs took about 4 hours on the bench to tear down and fix.I spent 2 days messing with them.Including building the $25 sync tool.It worked perfectly.
Do the mod to the carb I showed.You have to tear it that far apart to clean all the ports anyway.
There is a way to check the slide operation off the bike by using a vacuum cleaner to simulate the engine.Ask if you have any trouble and post pictures for us.

Check the link to my carb repair..viewtopic.php?f=5&t=9179

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Wed Feb 22, 2012 3:09 pm

Oh,by the way,syncing the carbs makes a world of difference and can cost over a hundred bucks at a shop.Something I wanted to be able to do myself.
I had a bad time with mechanical(and expensive)gauges,so I dreamed up this method.It's really easy to use and see exactly what needs adjusting...viewtopic.php?f=16&t=8994

User avatar
seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Carb rebuild 84 1200 interstate

Postby seabee_ » Thu Feb 23, 2012 12:36 am

I hear Randakk's is a good source for carb kits. He's got some good tech articles too.
http://www.randakks.com/Carb%20Parts.htm
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

User avatar
firstwing
Posts: 37
Joined: Wed Jun 22, 2011 3:05 pm
Location: Pittsburgh, PA
Motorcycle: 1985 GL1200A, 2006 Suzuki C50 Blvd.

Re: Carb rebuild 84 1200 interstate

Postby firstwing » Sat Feb 25, 2012 11:18 pm

I just did my carburetors today. Not hard just time consuming. MAKE SURE YOU HAVE A SHOP MANUAL!!! It makes it much easier to know the Removal and install procedures. I still have to synchronize and fine tune them. The rebuild kits cost me about $125.00 for four carbs. So far, well worth the effort. Good luck with yours.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Mon Mar 05, 2012 4:12 pm

Okay, I removed the Carbs yesterday with no broken parts. :D It was easyer than I thought. Okay Virglemobil, I am going for it. Here are my starting questions:

1. After I tear down the carbs. What solution do I soak the units in and how long?
2. What is the best way to clean the carbs?
3. Like Virglemobil suggested, I am not buying the rebuild kits unless I need too. Where can I buy just the big intake o-rings that connect the carbs to the engine, the manuel suggest replacing any time removed?
4. what do I soak the needle valves and brass fittings in and how long?
5. Is it ture that all a carb rebuild is, is just cleaning and buffing to bring back to new?

Thanks everybody. I am taking good pictures of every thing I take off and where it goes.

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Mon Mar 05, 2012 4:43 pm

I'll jump in cause I bullied you into it.The "O" rings....I took one to NAPA and they matched it.Your local Honda dealer MAY have them in stock.Another is to buy a generic metric "O" ring kit.I think I got every one Harbour Freight has.
The only reason to soak the parts is if they are badly oxidized,otherwise, I just use brake cleaner and a tooth brush.
Some have a concoction of water and vinegar setting a day.Whatever is necessary.
I actually polished all the inside brass with regular polishing compound(the idle needle valve,fuel needle and seat).The jets are cleaned without using anything that can scratch the hole.Usually a fine brush and compressed air.Brake cleaner in the eyes is not good.
The aluminum slides and bore were polished with 2000 grit paper and then Mothers aluminum polish.

Post a bunch of pictures.Even close ups.Of the carbs naturally,We'd like to see the slides and the bowl end.
Just remember,this is a mechanism,not magic.If all the holes are clear for fluid and the moving parts move smooth...it will work fine.

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Tue Mar 06, 2012 12:54 pm

one more thing.As you have noticed,the slides use a rubber diaphragm.Be careful not to tear it.Look for holes or splits.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Tue Mar 06, 2012 1:15 pm

God you make it sound so easy :lol: Tonight I will take pics and post.

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Tue Mar 06, 2012 2:45 pm

Easy?just one piece at a time is easy. It's just that there a lot of pieces.It takes time.There's no magic that can hurry it up.The most extensive cleaning took me 5 hours.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Thu Mar 08, 2012 2:11 pm

Here are my carbs off the bike before i am going to tear into them. This bike has not been on the road since 1991. How do the carbs look?

Give me any thoughts. I begin digging into them tomorrow.
Attachments
Does the dirt runing out of the carbs look normal?
Does the dirt runing out of the carbs look normal?

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Thu Mar 08, 2012 2:32 pm

They look in better shape than mine were.
The stuff in the throat is old gas residue and cleans right up easy.
Be careful when popping the top caps.There is a rubber diaphragm under there.,and it is tedious getting it to set in the lip when you put it back on.
And don't mix any of the parts between the carbs,as in the covers,slides spring,and slides from carb 1 should go back on carb 1.
I marked the carb body,bowl ant top with a sharpie and used 4 cans marked the same way for the parts to be cleaned.
Your gonna want to remove the idle adjust caps to get the needle out to clean the idle port.There is a small spring and O ring in there.
Don't forget to look at my post with pictures i listed above.
DO NOT USE CARB CLEANER.IT WILL AFFECT THE RUBBER.Use brake speaker.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Thu Mar 08, 2012 4:30 pm

Thanks Virgel, that is some good advice. Stay close so i don't panic. :)

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Thu Mar 08, 2012 5:00 pm

Like so many others that watch this post,I'm informed on my phone every time you post a panic attack.
If it doesn't seem right or something is putting up a fight....stop and post a pix.
Everybody watching what you do next.
I don't want it to sound like your the Guinea Pig on this project,some of us have been there already. :)
We all learn new things by what you are doing too.

Oh,it's brake cleaner not speaker.Finger blight :|
And one other misprint..I said in a earlier post..."The aluminum slides and bore were polished with 2000 grit paper and then Mothers aluminum polish."
Well that was on the 1100.The 1200 uses composite slides.
I did however smooth them and the bore with the same 2000 grit paper.Same results.A butter smooth operating slide,verified with a shop vac attached to each one.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Fri Mar 09, 2012 2:56 pm

Okay I have begun. Here are my pics and questions. I put the questions on each picture. So just refere to the pictue number and the question. e.g. picture 2 question 3

This is going to be fun.
Attachments

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Fri Mar 09, 2012 6:44 pm

Pix 1..Yes those are the slides.I used 2000 grit wet/dry paper from WalMart to smooth the surface,and polished the bore with the same paper.I removed the needle to add a flat washer to lift the needle a little.
pix 2..The best I can describe,is it's a egr system.Just replace the"O" rings and use a bit of grease to get them to slide back in the hole.The rubber diaphragm only needs tending to if it has a pinhole or tear in it.
pix 3...On the bottom,there is a rubber diaphragm,it's is a fuel enriching valve to prevent deceleration backfire.Just check that it is intact and free moving in the housing.It's not uncommon that they don't need replacing.The little brass pins are fuel en-richening valves,kinda like a choke.Douse them with WD40 and let them soak.work them easy to free them up.The plastic is the holder.If one is stuck open,it will overload that cylinder with gas.When there disassembled,clean them up,there spring loaded to seal off the extra fuel.

The one that's broke,needs to be removed and freed up to verify that it seals.Now remember,this part is to allows extra fuel(choke)during cold cranking.Can you do without 1 out of the 4 used?Yea probably. 2nd option,use a microfile and cut a groove near the end and put on a "E" clip to simulate the missing end or just leave it non functional,cleaned of course(or try to find one in a kit or a freebe from another poster.
pix 3..That stuff is a EGR holding chamber.The reeds need to be cleaned with brake cleaner and her tooth brush.Don't disassemble the control diaphragm,It can be hand moved and washed out.

See...easy isn't it...Don't tell momma I said to use her toothbrush :roll:

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Fri Mar 09, 2012 7:37 pm

Thanks Virgil, Here are somemore questions. I am working on the answers you gave me last.

Okay, now I will start cleaning poking and blowing. Have a great weekend. My questions next I am sure will be how to questions once I start cleaning.

Thanks and have a good weekend.
Attachments

User avatar
seabee_
Posts: 494
Joined: Sun May 29, 2011 8:17 pm
Location: sterling heights, mi
Motorcycle: 1985 Honda Goldwing GL1200
117k miles
1977 Kawasaki kz400
1978 Suzuki GSXr750
1980 Kawasaki GPZ400
1975 Honda CB360T

Re: Carb rebuild 84 1200 interstate

Postby seabee_ » Fri Mar 09, 2012 7:40 pm

I know the following tech article link is for an 1100 carb set, but the guy did a great job with labeling the pics and functions of all the components. Great info to learn something about the carb setup on the older 'wings.
http://ngwclub.com/forum/viewtopic.php?t=12168
Paul
CE1 Navy Seabees/RET
1981 to 2002
ASE Mechanic

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Fri Mar 09, 2012 7:56 pm

Ok ,good so far.
pix 1..The screen is to keep large trash out and disperse misfire blowback.Hold the screwdriver real tight and smack it with a hammer while trying to loosen the bolt.The screen,after out could be repaired.

pix 2...The screen..be real careful with it.they need to be soaked and then cleaned GENTLY.
All the other parts are just pieces of brass with holes in them.Clean with a brush,polishing compound,toothpick,etc.The jets have a hole through them.besides the ones on the side.The idle jet is verrrry small.even a sewing needle won't fit.
Where the fuel valve is,there is a rubber tip.I cleaned mine with a rag and brake fluid.The needle is just polished.

pix 3..as far as the gaskets.do not remove them from the groove they set in.I wipe them clean with a soaked rag.What I've done to ensure they seal back up,I use a VERRRRY thin coat of Permatex *2.Just enough to get a little on the rubber.Don't slather it everywhere.

I also use a thin coat on the slide rubber little lip to help hold it in place when I assemble the top.
Last edited by virgilmobile on Fri Mar 09, 2012 8:03 pm, edited 1 time in total.

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Fri Mar 09, 2012 8:00 pm

More information is good.Be careful tho,some carb cleaners will eat into rubber.That's the reason I use brake cleaner.And even it will eat some plastics.

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Fri Mar 09, 2012 9:01 pm

Thanks so much Virgil. having you here makes me feel cofident. To late I already took the old ladies toothbrush. LOL!

Two more question, then I am going to bed. Here are the pics.
Attachments

User avatar
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: Carb rebuild 84 1200 interstate

Postby virgilmobile » Fri Mar 09, 2012 9:08 pm

No further necessary,just a drop of oil on anything that moves,and don't remove the insert tubes,just flush them out

poffutt
Posts: 53
Joined: Fri Jan 27, 2012 9:22 am
Location: Houston, Texas
Motorcycle: 1984 Goldwing Interstate GL1200

Re: Carb rebuild 84 1200 interstate

Postby poffutt » Sat Mar 10, 2012 9:09 am

One more Virgil.(for right now)
Attachments




Return to “GL1200 Information & Questions”




Who is online

Users browsing this forum: MSNbot Media [Bot] and 1 guest