Carb pilot screw turns? 1988


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zamboni920
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Carb pilot screw turns? 1988

Postby zamboni920 » Sat Jun 09, 2012 6:31 pm



In the middle of cleaning/rebuilding carbs. Found a good, inexpencive set locally....now I am getting them ready to swap with the ones on the bike. I soaked both carbs , needles and acc pump in mineral spirits(after removing needles and all "soft" parts). After 1/2 day soak, I "boiled" them (per Randakk's recommendations). Rebuild kit is also from Randakk.
I checked the turns on pilot screws, until lightly seated, and got 1 1/2 turn on right carb, 1 1/4 turn on left. I am pretty sure neither needle had been touched (and carbs supposedly came off a running 1988).
Confusion after reading Clymers initial turns out from seated. Clymer states 3 1/8 turn. That is a big difference, I am just not sure wich to go by. Clymers spec for 1989 is 1 1/2 ....now I am wondering if these carbs came off an 1989. Are the needles the same on '88 and '89 ? If so, I should be able to follow Clymers spec for '88 ?!



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virgilmobile
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Re: Carb pilot screw turns? 1988

Postby virgilmobile » Sun Jun 10, 2012 10:33 am

Follow the book.You'll touch them again after the sync.You will need a really long screwdriver.
88 and89 are the same carbs.apparently they changed in 90.My local has a set from a 96that I'd like to put on my 88 but he wants $600 for them(not rebuilt either).He's nuts.

Pay attention to the accelerator pump and test it.Mine is causing a hesitation problem.
It was $50 just for the accelerator pump diaphragm.

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Sun Jun 10, 2012 4:19 pm

Will follow the book.....as you say, I will be adjusting again anyway.
Randakk's rebuild kit came with O-rings and diaphragm for acc. pump. The one on these carbs were a lot harder than the new one, so I think it might make a noticable difference.
When I bought this set ($79.99 ....$600 is really up there!) , I also got the auto shutoff valve. The vacuum test on the one on my bike showed negative...would not hold vacuum, so bad diaphragm. The new/used one is good, holds 8in vacuum .
Removed my carbs today....not as bad as I thought after hearing the horror stories. Now I will doan evaluation to determine if it warrants the swap, or do a simple cleaning of existing carbs. Think the slow jet is my main problem.
Also noticed the new/used carbs have #55 and #155 jets, wich were done per a Honda recall I believe. The '88 came with #50 and #155 as I understand. I will check the carbs from the bike on this too.
Not found any torn/leaking vacuum hoses, but many weak ones.
Also spent a good amount of time vacuuming out acorns and squirrel poop from top of engine.

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Re: Carb pilot screw turns? 1988

Postby virgilmobile » Mon Jun 11, 2012 10:19 am

Look under the rubber mat that's under the carb assembly.I had 1 hose there that was so deteriorated that it would collapse shut with a vacuum.
The carb also had a few on them.
It seems to be weekend where there is a sharp 90* bend in a hose.
I think I found 9 total on mine.2 on each intake manifold near the plugs.
Just pull on the hose,if it weak,it will start to collapse.

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Mon Jun 11, 2012 3:28 pm

Checked some of the hoses. Still more to check, and definitely some to replace. No breaks as far as I can tell, but several weak ones. See picture.
The rubber mat, supposedly a heat shield, was so deteriorated and ripped (squirrels living there at some point in the past :D ) , I removed it. Planning on either cutting a new one out of EPDM roofing rubber, or make an aluminum shield.
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virgilmobile
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Re: Carb pilot screw turns? 1988

Postby virgilmobile » Mon Jun 11, 2012 4:18 pm

Yup..you got your finger on it.Some of those are vacuum lines and can get sucked closed under high vacuum.
Look in the intake runners(left and right) they have 2 on each.
Poke around the right side,sandwiched in the frame work for a canister and filter.Check the filter and all the hoses for a tight fit and weakness.

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Mon Jun 11, 2012 6:35 pm

One short vacuum line on right side intake, runs from a tee making a 90 deg into manifold, seems to have been replaced at some point with a piece of fuel or air hose(reddish braided exterior). It is very hard, and slips off the fitting on manifold too easily. might not make much difference under vacuum though. Will be replaced anyway.
I am going to test and try a new kind of vacuum hose.....Legris Polyurethane flexible tubing. Seem to have all the characteristics needed. Great chemical resistance to oils, gasoline etc., and it can easily bend into a 3/4 inch radius without kinking. Safe operating temp from -90F to +175F. I can max out my MityVac vacuum gun on a 5 foot piece without collapsing.
Another thing I found was one rubber sleeve connecting carb to manifold is loose from manifold. It can be twisted around with two fingers, easily. Looked like the clamp was tight though, so I will have to investigate further. I assume this could suck in false air into intake.
About filter(s) ......I can not seem to find the "infamous" Sub-air filter. Can anyone point me to the exact location. Clymer's manual has a neat little drawing of the filter assembly itself, and say to change when changing regular air filter, but absolutely no mention of where to find it.

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Re: Carb pilot screw turns? 1988

Postby virgilmobile » Mon Jun 11, 2012 7:37 pm

On you knees boy.
There are 2 filters to tend to
On the right tucked in a gap,about the same level as the air control Valves
On the left is a black box across from the CB area

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Re: Carb pilot screw turns? 1988

Postby WingAdmin » Mon Jun 11, 2012 9:25 pm

zamboni920 wrote:About filter(s) ......I can not seem to find the "infamous" Sub-air filter. Can anyone point me to the exact location. Clymer's manual has a neat little drawing of the filter assembly itself, and say to change when changing regular air filter, but absolutely no mention of where to find it.


Click on Search and ye shall find. :) Have a look at How to replace your cruise and sub air filters

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Re: Carb pilot screw turns? 1988

Postby RBGERSON » Tue Jun 12, 2012 7:51 am

LOok in the how to articles forum..it's there..
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Fri Jun 15, 2012 8:07 pm

Rebuilt my existing carbs, rather than the spares I got. The two sets also have different carb numbers, wich I am not sure if would make a difference. My spares came with all vacuum hoses attached, and all in great condition. Swapped many of them to my bike. Took "millions" of pictures, if anyone need reference pictures. Replaced sub-air filter....mine was indeed crumbling.....became dust when removed.
I finished tonight....installed carbs (harder to get them back in, then out), attached all lines, etc.etc. Double checked everything. Went to start, before airfilter and plastic gets remounted. It fired, but did not run. Then I smelled the GAS .........come to realize I forgot to put fuel bowl drain screws back in :evil: .

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Re: Carb pilot screw turns? 1988

Postby Kiwi2 » Sun Jun 24, 2012 6:16 am

I remember many years ago when I had the carbs on the Wing tuned that there is synchronization adjusting screw (its too late at night too be writing things like that)
Ref to 3-28 on the 1989 1500 Gold Wing Service Manual. It shows a picture of where to get at it as you will need a long screw driver and its round the fan area.

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Sun Jun 24, 2012 8:16 am

Have it all done, except some minor tweaking.....sync and final pilot screw adjustment.
Took lots of pics if anyone need references to vacuum hoses and such.
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Re: Carb pilot screw turns? 1988

Postby Mariocupet » Wed Jun 27, 2012 11:31 am

I found the long screwdriver at Harbor Freight and I believe it was $10.00 for both the standard and Phillips srewdrivers in one package. If I remember correctly they are over 20 inches long.

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Re: Carb pilot screw turns? 1988

Postby Kiwi2 » Wed Jun 27, 2012 4:20 pm

Being that long they should reach from Texas to Utah :lol:

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Re: Carb pilot screw turns? 1988

Postby Mariocupet » Wed Jun 27, 2012 4:28 pm

Lol, I'll point it that way then you can just granite and use it.

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Re: Carb pilot screw turns? 1988

Postby zamboni920 » Wed Jun 27, 2012 4:34 pm

Mario....just bought those a few days ago....damn they are long (24" ). Now i just need to use them :D .
Kiwi....I could probably adjust your pilots too, from East Coast US :lol: .

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Re: Carb pilot screw turns? 1988

Postby Kiwi2 » Wed Jun 27, 2012 6:01 pm

Tell me when and at what time as I don't want to be doing it early hours of the morning and I will line the bike up to be ready for you. :lol: :lol:

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Re: Carb pilot screw turns? 1988

Postby millerized » Sun Mar 20, 2016 1:02 pm

Mariocupet wrote:I found the long screwdriver at Harbor Freight and I believe it was $10.00 for both the standard and Phillips srewdrivers in one package. If I remember correctly they are over 20 inches long.

And they're near useless in their current state for anything other than the sync screw.
You gotta grind the tips almost down to an 1/8" wide tip to get them into the screw and not have them hang up on the little lip of the carbs.
You'll also drive yourself nuts trying to keep it on the screws. I've got the right side radiator fan off, with a mirror and flashlight in there to see where I"m going. Again. Just pulled the plugs...pure white with a frost on the electrodes. WAY too lean. 3 turns plus coming right up!

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Re: Carb pilot screw turns? 1988

Postby spiralout » Sun Mar 20, 2016 1:33 pm

millerized wrote:And they're near useless in their current state for anything other than the sync screw.
You gotta grind the tips almost down to an 1/8" wide tip to get them into the screw and not have them hang up on the little lip of the carbs.

That's why you grind off the boss on the lip of the float bowl when you have the carbs out then a 1/4 flat head is perfect.
millerized wrote: I've got the right side radiator fan off, with a mirror and flashlight in there to see where I"m going. Again. Just pulled the plugs...pure white with a frost on the electrodes. WAY too lean. 3 turns plus coming right up!

It's easier to either take off the rad grill and go through there or remove the air box and use a mirror to get to them from in front of the carbs than through the side of the bike, imo. Are you adjusting with the bike running or just richening it up by guess?

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Re: Carb pilot screw turns? 1988

Postby millerized » Sun Mar 20, 2016 3:14 pm

spiralout wrote:
That's why you grind off the boss on the lip of the float bowl when you have the carbs out then a 1/4 flat head is perfect.

So NOW you tell me... :lol:

spiralout wrote:It's easier to either take off the rad grill and go through there or remove the air box and use a mirror to get to them from in front of the carbs than through the side of the bike, imo. Are you adjusting with the bike running or just richening it up by guess?

Had them at 3 turns out, took them to 3.5. For me, it's much easier the way I did it because I had the sides off already. Fan comes out in a few seconds ( 2ea 10mm bolts) and I can see everything with the mirror and flashlight very well from the side. Small enough hands can get in there and position/hold if necessary. This 'should' be the last time I needed to do it this year.

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Re: Carb pilot screw turns? 1988

Postby spiralout » Sun Mar 20, 2016 4:53 pm

millerized wrote:
spiralout wrote:
That's why you grind off the boss on the lip of the float bowl when you have the carbs out then a 1/4 flat head is perfect.

So NOW you tell me... :lol:

Ya, sorry about that
millerized wrote:Had them at 3 turns out, took them to 3.5.

Try using JD's method he posted here http://www.goldwingfacts.com/forums/2-goldwing-technical-forum/426066-1500-fuel-mixture-diagnosis-test.html




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