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Started by NightBiker07 at 03-01-2010 11:52 PM. Topic has 32 replies.

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   03-01-2010, 11:52 PM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Separating the carbs
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I am thinking about having the carbs polished, as they look like CRAP. I can have it done fairly reasonably priced, but i am concerned with splitting the carbs, as I dont have the tools to re-sync them.

Is it a big deal to do this? or should i just leave it alone this year. i dunno what i want to do yet

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   03-02-2010, 3:34 AM
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Re: Separating the carbs
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It's mildly a big deal if they are already synced. Why not just take the caps and bowls of them and have them polished for starters. That can all be done easily with a screwdriver. Do you have a picture to show how bad the carbs look?

1979 CX500 Supertanker
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   03-02-2010, 6:00 AM
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Re: Separating the carbs
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I agree with Don.  Separating the carbs serves little purpose, you should be able to clean them without separating.  Getting the springs, and carbs back aligned with each other introduces problems you don't need.  Just polish the bowls, ACV covers, and vacuum piston caps and clean the rest.  Re-syncing is the easiest of the issues to resolve. 

Blue Fox
1983 GL650I, 79-CX500C, 1980 CX500C, 82-GL500I, 82-GL1100, 76-CB550, 81-CB750C, 73-CB350F, 71-CT90,
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   03-02-2010, 8:38 PM
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Re: Separating the carbs
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The guy will polish both carbs for 25 a piece. the guy does AMAZING work.
I think I'm gonna take em apart, i can tear apart anything, and get it back together. if i have any questions, I will be here asking away.

I will take before and after pics of everything i have done. I think you will be pleasantly surprised.
Before


After





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   03-03-2010, 9:14 AM
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Re: Separating the carbs
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I am going to send the carbs together, he can get to most of the carbs without separating, and its not like the very middle of them will ever be seen.

i am also sending the front brake master cylinder, kill switch cover, headlight switch cover/clutch lever and gas tank arm. 85 bucks to have it all done, he's having a march special on his services.

would still only have been 110 to have it all done, hes very reasonable on pricing.

I will be sure to get before and after pics

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   03-03-2010, 9:40 AM
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Re: Separating the carbs
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Smart move on keeping the carb together, that may save much frustration later.  You know that for $85, you could get set up with a buffing wheel and compounds and do this yourself.  There is a lot of satisfaction in learning how to do this.  The handlebar controls are the most difficult.  Lots of little crevasses on them and they have to be de-anodized to get to raw aluminum.  It  just depends on how involved you want to get in the restoration process, but there will be many more items that you may want polished.  Just ask rickbert, he polishes the back of his license plate. 

Blue Fox
1983 GL650I, 79-CX500C, 1980 CX500C, 82-GL500I, 82-GL1100, 76-CB550, 81-CB750C, 73-CB350F, 71-CT90,
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   03-03-2010, 12:32 PM
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Re: Separating the carbs
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Ive tried my own polishing in the past. The handlebar controls would be simple compared to the carbs. I can never get a real good shine out of anything i have ever tried, and i'd rather pay to have it done. a buffing wheel would be useless on the carbs anyways, I'd need a dremel with tiny polishing pads.

simply put, i would NOT polish HALF of someones carb for 25 bucks, let alone the whole thing.

and besides, those are about the only parts i will have polished. The motor gets covered in road grime too much for the polishing to last long, and the majority of other small parts will get painted anyways. I was going to paint the handlebar stuff, but decided on polishing, as it will last much longer than paint will under constant contact. and the gas tank arm/cap being shiny will look killer on the black tank.

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   03-03-2010, 2:28 PM
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Re: Separating the carbs
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I saw pull em apart...how else ya going to learn how to fix them. I just pulled a rack of 4 apart....not that tough. Just take your time and pictures along the way.
83 CB1100F Super Sport
No Twins at this time. :( Went through about 12 of them tho!
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   03-03-2010, 2:40 PM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Re: Separating the carbs
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I will learn to fix em when i need to. i just went through and cleaned them, and it ran pretty good before. i cant imagine how well it will run now. point being, that with crap like this, I dont like fixing it unless its broke. being that i had the carbs torn down, i wont know where to start looking for a problem if it doesnt run properly upon re-assembly.

that, and upon closer inspection of the assembly, about half the screws have been transformed into non-removable screws......

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   03-03-2010, 3:25 PM
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Re: Separating the carbs
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OK,
Sometime find a junk set and have at it!
83 CB1100F Super Sport
No Twins at this time. :( Went through about 12 of them tho!
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   03-07-2010, 1:30 PM
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Re: Separating the carbs
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If you take both carbs apart at the same time for any reason, make sure that you mark the caps & slides so that they can be put back together the way they came apart. They are matched sets and should not be mixed up.

Mr. Honda ('83 GL1000/Dnepr) summer
The Famous Eccles ('84 GX650EI/Velorex700) winter
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   03-09-2010, 10:16 PM
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Re: Separating the carbs
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Well, the parts are done, getting shipped back to me tomorrow.
Before and after




80 CX 500
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   03-09-2010, 10:58 PM
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Re: Separating the carbs
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very nice,a lot of work has gone into that

when i feel the need,i do it,llego,ve 60,s
-----------------------------

2008.1982 honda gli silverwing [uk model ]
2010.1981 honda gli silverwing [uk model ]


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   03-09-2010, 11:11 PM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Re: Separating the carbs
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Most amazing part, he recieved the parts tuesday morning, tuesday night he sent me the after pictures. Less than $100 for all thsoe parts to be done, with a 25% off discount. he was having a special on his services through the first half of march for members of that forum. but still, the price would have been less than 125 for all that normally. cant beat that.

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   03-10-2010, 3:01 AM
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Re: Separating the carbs
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send us his link so we can send him some buisness.

jerry
90 PC 800 (commuting steed)
82 GL500I (50+mpg, great bike)

66 BMW R 50/2 (No brakes/HP)
80 CX500C (Loved this bike)
74 CB360 (Fun; but too small)
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   03-10-2010, 9:33 AM
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Re: Separating the carbs
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Greg King <gkingpolishing@hotmail.com>
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   03-10-2010, 9:57 AM
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Re: Separating the carbs
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HOLY HARLEY SHINY BATMAN!!!!!

Man, I am just way too sloppy and lazy to maintain that level of shine on my bikes - LOL

Mine get washed only when caught in the rain - lol

But no doubt them parts sure do look purty.
2003 Ural Tourist - 80,245kms to date
1982 Honda GL500 Interstate 12,800 miles since 05/30/07

"Down the highway of life at smiles per hour, with special attention to ignorant and blind cagers"
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   03-10-2010, 11:28 AM
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Re: Separating the carbs
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They are getting shot with clear. i hate cleaning polished aluminum. And if they go to shit, well, i guess they go to shit.

80 CX 500
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   03-10-2010, 11:51 PM
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Re: Separating the carbs
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Were they cleaned as well on the inside as on the outside??? If they didn't see an ultrasonic cleaner on the inside they still won't work any better.


David From Wisconsin ... R80Dave
'82 GL500I alias Candy
'82 GL500I alias Candy II
'00 BMW K1200LT & trailer
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   03-11-2010, 1:17 AM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Re: Separating the carbs
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 DavidfromWisconsin wrote:
Were they cleaned as well on the inside as on the outside??? If they didn't see an ultrasonic cleaner on the inside they still won't work any better.



I personally tore the carbs apart and cleaned every jet out with a oxy torch tip cleaner and sprayed them out with carb cleaner, then rinsed with brake cleaner. i got a LOT of crap out of them, cant believe it even ran, let alone run as good as it did.

80 CX 500
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   03-11-2010, 10:30 AM
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Re: Separating the carbs
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Not trying to be negative, but if you problems down the road from crap coming loose inside the carbs try an ultrasonic cleaner.

I have a friend, who is a good mechanic,who did the same thing you did 5 separate times. The bike still ran like crap. I disassembled the carbs, pulled all the jets, put the carbs in an ultrasonic cleaner for about an hour and a half and rinsed them a few times and blew them out each time and reassembled everything.

It purred like a kitten and ran great through the whole range right up to red line. Please keep that in mind if it isn't fixed.

You might want to buy Larry's carb book, which will soon be available. It is excellent. When you read his book you will see his carb service is worth every penny he charges.


David From Wisconsin ... R80Dave
'82 GL500I alias Candy
'82 GL500I alias Candy II
'00 BMW K1200LT & trailer
'81 KZ440 (Wife's learning bike)

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   03-11-2010, 10:47 AM
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Re: Separating the carbs
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I think the point has been missed by several of you.

He didn't want to separate them to get them to work better, but rather so that the polisher could getat the other side to work his magic on them.

BTW: I would highly recommend installing new seals before you put fuel in them if they have been separated. From what I've read, the old, hard seals tend to leak if they are disturbed.

If you haven't already done so, while they are out of the bike and will need to be set up again when they go back in would probably be a good time to put a Randakk kit in. 25+ year old o-rings eventually crack.
Mr. Honda ('83 GL1000/Dnepr) summer
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   03-11-2010, 9:26 PM
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Re: Separating the carbs
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I was looking for a kit, but the only thing i could find was OEM, and for what they charge for the stuff to rebuild the diaphragms and new O-Rings, i could get two Real nice Modern Keihin carbs and be done with it.

where is this kit you mentioned?

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   03-11-2010, 10:05 PM
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Re: Separating the carbs
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 NightBiker07 wrote:
I was looking for a kit, but the only thing i could find was OEM, and for what they charge for the stuff to rebuild the diaphragms and new O-Rings, i could get two Real nice Modern Keihin carbs and be done with it.


If you ever get around to adapting modern carbs to the CX, please post the how to and BTDT info.  This subject seems to spring up with regularity on the list.

1978 CX500 - I live on a one-way street that's also a dead end. I'm not sure how I got here, or how I'm going to get out.
Four wheels move the body; Two wheels move the Soul.
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   03-11-2010, 11:02 PM
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Re: Separating the carbs
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Just find 2 matching carbs with close to the same sizes fot the rubber boots, stick em in there, figure out a way to actuate both carbs simultaneously, balance them and jet them properly.

it would be pretty simple, except for the jetting. I hate jetting. period. you would need a pile of jets, both main and pilot, plus a pile of needles. you would have to get friendly with a bike shop and see fi you can return all the sizes you didnt actually need while you were experimenting. i would imagine a baseline of 115 main and 45 pilot would be a decent place to start. making sure the jetting wasnt too lean all the way through the RPM would be very important, otherwise a mid-throttle siezure or piston crown hole could occur.

but actually installing them, running the fuel line, and the throttle cables would be simple (modern dirtbike carbs have the throttle cable going into the top of the carb, need a splitter or something)

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   03-12-2010, 8:33 AM
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Re: Separating the carbs
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 NightBiker07 wrote:
I was looking for a kit, but the only thing i could find was OEM,

http://www.randakks.com/  has the best kits you will find anywhere. In addition to being a noted GoldWing restorer, Randall is one of us (a member of this forum) and was a close friend of Dick (on this forum, that says a lot). When he can't find parts that meet his standards he buys molds and has them made.

and for what they charge for the stuff to rebuild the diaphragms

Ummmm.......... CX/GL500/650 carbs don't have diaphragms. They have plain slides.

Mr. Honda ('83 GL1000/Dnepr) summer
The Famous Eccles ('84 GX650EI/Velorex700) winter
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   03-12-2010, 9:10 AM
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Re: Separating the carbs
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 Sidecar Bob wrote:

Ummmm.......... CX/GL500/650 carbs don't have diaphragms. They have plain slides.


ACV's are probably what he is referring to.  Diaphragms!

Personally I'd just bypass them.

1983 GL650i
Had 4 CX/GL's at one point this year, down to one, next spring is another adventure!

age 38 (29 plus tax)

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   03-12-2010, 7:58 PM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Re: Separating the carbs
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Technically, those thin composite things that act like pumps/valves ARE a diaphragm.

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   03-12-2010, 8:10 PM
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Re: Separating the carbs
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Yeah. I guess air cut valves and acceleration pumps are diaphragms, but your CX500's carbs don't have them.
Mr. Honda ('83 GL1000/Dnepr) summer
The Famous Eccles ('84 GX650EI/Velorex700) winter
WHY I HAVEN"T BEEN AROUND MUCH LATELY
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   03-12-2010, 9:08 PM
NightBiker07 is not online. Last active: 7/13/2010 4:23:30 PM NightBiker07



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Re: Separating the carbs
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Yep, they do.

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   03-13-2010, 3:53 AM
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Re: Separating the carbs
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OK. I stand corrected. They have air cuts.

Do they have an accelerator pump? If they do it must have been the first year.

I thought they didn't add those until the redesign in '81

Mr. Honda ('83 GL1000/Dnepr) summer
The Famous Eccles ('84 GX650EI/Velorex700) winter
WHY I HAVEN"T BEEN AROUND MUCH LATELY
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   03-13-2010, 9:59 AM
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Re: Separating the carbs
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Yep, accelerator pump too.

Im thinking someone had changed quite a few things on this, theres a lot of stuff that isnt quite right, or has been broken and nigriged back together.

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   03-13-2010, 11:40 PM
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Re: Separating the carbs
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Well, i sync'd the carbs in a not-so-conventional matter. I used a BRIGHT LED flashlight and shined it through the carbs, and adjusted the butterflys until no light shined through anywhere on either side. there was maybe 1/8 of a turn before one side or the other started to open and let light slip through. I did it in a dark room too, just to make sure i wasnt missing anything.

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