Author Topic: Carbs clogged up?  (Read 8617 times)

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Offline 2linby

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Carbs clogged up?
« on: April 22, 2009, 01:24:00 am »
Man if it ain't one thing it's another! Sunday my battery died (broken plate inside diagnosed by our very own Rich Reed!)) so I had to get a jump to get home. New battery installed and a run to the gas station for a fill. Leave the station and the bike starts to bogg. Idle is fine (maybe a little low)but it hesitates and bogs under load. No vacuum leaks, plug wires fine and sparking.  It also has a slight (not all the time) backfire and a light smell of gas.    I'm figuring I got some gunk in the carb.    Any learned opinions on the matter as I'd rather not pull those damn carbs to clean them if I can avoid it.    It's been 4 years since I pulled them so I too am a bit rusty (oh and no rust in the tank and nothing coming out of the carb float bowls either).    I also just used a can of techron (probably wasted some moeny, but what the heck) to see it it'll clean things up.    I bow to the collective wisdom.   :confuse:  AKA "2linby" That's 2-lin-by folks!  Northwest Area Director  COG #5539  AMA #927779  IBA #15034  TEAM OREGON MC Instructor    http://community.webshots.com/user/2linby  http://tinyurl.com/njas8 (IBA BunBurner Gold Trip)  http://tinyurl.com/lwelx (Alaska trip)
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Offline Colin

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Carbs clogged up?
« Reply #1 on: April 22, 2009, 01:47:00 am »
Hi Bob;    Sounds like the slow running jets are cloggd.  Suggest you purchase Steve's jet kit and a set of needle valves from Murph and give the whole rack an overhall. You will find the new valves from Murph have 2x the spring tension so way better at closing the flow and reducing the likelyhood of flooding carb and dredded hyrdrolock.    Colin Prior  Cogmos Administrator  Lake Forest Park WA  COG#7767  AMA#1081764  
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Offline Brett0769

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Carbs clogged up?
« Reply #2 on: April 22, 2009, 08:49:00 am »
Is there a recommended maintenance interval on the carbs?  
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Offline Robert_Elliott_GA

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Carbs clogged up?
« Reply #3 on: April 22, 2009, 09:40:00 am »
I had a similar issue and after suggestions, simply put the petcock in free flow mode and drained the bowls.  I then added an inline NAPA fuel filter and haven't had a problem since.  Just my thoughts.  Robert Elliott  Cornelia, GA  2006 C10  COG # 7598  CDA#0293
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Offline Slybones

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Carbs clogged up?
« Reply #4 on: April 22, 2009, 10:20:00 am »
While a can of seafoam seems to be the most posted choice around here, I thought Techron was supposed to be some pretty decent stuff.   2003 Concours, 48K  COG #6953  IBA 28004  http://mysite.verizon.net/slybones/Concours/connieMain.htm  
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Offline Colin

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Carbs clogged up?
« Reply #5 on: April 22, 2009, 11:20:00 am »
Aw.. Come on guys!    Make him take the rack out its way more fun! LoL  :eg:    I agree that if you can fix it with some fuel additive cleaner fine. But if the slow running jet pugs are still on, and the bike has had 30K plus miles, its probably worth the trouble to pull the rack, and if you plan to do that why not tune the carb with the re-jet kit while your at it to remove the 2,000 rpm stumble, and improve throttle response.  Colin Prior  Cogmos Administrator  Lake Forest Park WA  COG#7767  AMA#1081764  
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Offline conando

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Carbs clogged up?
« Reply #6 on: April 22, 2009, 11:39:00 am »
Did you check for water in the carbs?    Did you check for corrosion on the plug wires where they are pinned to the plug caps?  
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Offline Slybones

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Carbs clogged up?
« Reply #7 on: April 22, 2009, 12:36:00 pm »
Colin that would be "and the bike has 130K plus miles" in Bob's case.    Seems like Bob mentions, no vac leaks, plug wires ok and sparking, no rust in tank, and nothing coming from the float bowls.     Assuming its carb related it seems what ever is in there is actually plugging jets. I think thats why Colin is pushing for removal.     For what little its worth, I ran a can of seafoam through my tank ( actually 2 - 1/2 can tanks ) before I recently did the SISF jet kit. When Colin and I checked the pilot jets they were still a tad dirty. Nothing that could cause poor running, but you could see it.   2003 Concours, 48K  COG #6953  IBA 28004  http://mysite.verizon.net/slybones/Concours/connieMain.htm  
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Offline Camper Dave

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Carbs clogged up?
« Reply #8 on: April 22, 2009, 02:44:00 pm »
Hey... I took my carbs out AND put them back in too. And the best part Bob is that you can do it too, without a helmet!  :gasp:  Dave Muir  1980 LTD1000 - Rocket  1999 Concours - Rocket II  1997 Dyna - wife's  CT-COG #3649 Merchandise Czar
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Offline Zorlac

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Carbs clogged up?
« Reply #9 on: April 22, 2009, 03:18:00 pm »
Is there a recommended maintenance interval on the carbs?    Only when the bike runs like sheet after 20 cans of your favorite potion and you can stand the pain.  :p    I hear Dave will come over and do them for free.  
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Offline Camper Dave

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Carbs clogged up?
« Reply #10 on: April 22, 2009, 03:53:00 pm »
Quote
I hear Dave will come over and do them for free.  
Those are the voices in your head Mark, don't listen to them.....  Dave Muir  1980 LTD1000 - Rocket  1999 Concours - Rocket II  1997 Dyna - wife's  CT-COG #3649 Merchandise Czar
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Offline Brett0769

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Carbs clogged up?
« Reply #11 on: April 22, 2009, 05:09:00 pm »
Pish Posh! It's a scant 700 miles from your garage to mine Dave. I'll even spring for some wings and a six pack.  
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Offline 2linby

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Carbs clogged up?
« Reply #12 on: April 22, 2009, 11:56:00 pm »
Dave,    Don't you know I wear a helmet all the time?    Yeah I'm guessing I'll be pulling the carbs as soon as I use up the gas in the tank. Drained and flushed the bowls today and same thing.    Looks like a couple bucks are going to Murph! Oh well....... :confuse:  AKA "2linby" That's 2-lin-by folks!  Northwest Area Director  COG #5539  AMA #927779  IBA #15034  TEAM OREGON MC Instructor    http://community.webshots.com/user/2linby  http://tinyurl.com/njas8 (IBA BunBurner Gold Trip)  http://tinyurl.com/lwelx (Alaska trip)
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Offline Dirty Harry

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Carbs clogged up?
« Reply #13 on: April 23, 2009, 01:14:00 am »
H
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Carbs clogged up?
« Reply #14 on: April 24, 2009, 09:51:00 am »
One thing to check, if you previously removed the cards: There is a slight possibility that when you tightened the rubber carb-to-engine boots (intake manifolds), there could be a kink in one or more of the manifolds. The last step in reinstallation should be to stand above the carbs, take hold of them, and give them a good shake to properly seat the rubber. Then tighten the clamps. Also, you should thoroughly check the routing of all vaccum hoses. Service manuals have a schematic for hose routing. Just a thought, but it is a red flag to me that you recently did jet work and now suspect dirty jets. Build-up takes time. Trash from the tank would be more likely, or a bug in a vaccum line. Check everything out, including free and proper movement of throttle and choke cables. Having someone help puts more eyes on the not-so-obvious.  

Offline 2linby

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Carbs clogged up?
« Reply #15 on: April 25, 2009, 06:22:00 pm »
Small pilot jet on #4 was totally clogged and there was a #3 partial clog. the petcock screen and tank very clean. I guess a piece of crap just made its way past my in line filter that was much dirtier than I thought it was (based on the white color of the new one in comparison). Now I've just waiting on new air box to carb boots as the old ones do not want to behave. In the meantime I've changed plugs over to the NGK Iridum plugs cleaned and re-oiled the K&N air filter, mounted a progressive read shock that I bought used two years ago! and cleaned a bunch of things.    Can't wait to fire it up! I'm jonesing already!!!!  AKA "2linby" That's 2-lin-by folks!  Northwest Area Director  COG #5539  AMA #927779  IBA #15034  TEAM OREGON MC Instructor    http://community.webshots.com/user/2linby  http://tinyurl.com/njas8 (IBA BunBurner Gold Trip)  http://tinyurl.com/lwelx (Alaska trip)
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Offline Robert_Elliott_GA

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Carbs clogged up?
« Reply #16 on: April 26, 2009, 11:10:00 am »
Good to hear that the down time is letting you get a lot of other put off projects done as well.  Just be careful when you first get back on her, she won't be the same bike you remember with everything you are doing.    Robert Elliott  Cornelia, GA  2006 C10  COG # 7598  CDA#0293
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Offline Zorlac

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Carbs clogged up?
« Reply #17 on: April 27, 2009, 02:13:00 pm »
I guess a piece of crap just made its way past my in line filter that was much dirtier than I thought it was (based on the white color of the new one in comparison).    That sounds suspicious, I'd be considering all new fuel line if you haven't already.    
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Offline 2linby

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Carbs clogged up?
« Reply #18 on: April 27, 2009, 09:03:00 pm »
  That sounds suspicious, I'd be considering all new fuel line if you haven't already.    In addition to the new boots new fuel line tubing is also on its way! Thanks!      AKA "2linby" That's 2-lin-by folks!  Northwest Area Director  COG #5539  AMA #927779  IBA #15034  TEAM OREGON MC Instructor    http://community.webshots.com/user/2linby  http://tinyurl.com/njas8 (IBA BunBurner Gold Trip)  http://tinyurl.com/lwelx (Alaska trip)
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Offline Camper Dave

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Carbs clogged up?
« Reply #19 on: April 27, 2009, 09:47:00 pm »
Ya, new boots are the bomb!!!  I remember working on my LTD, I'd have to have the boots sitting in a pan of boiling water to get them on the carbs and into the airbox.   Dave Muir  1980 LTD1000 - Rocket  1999 Concours - Rocket II  1997 Dyna - wife's  CT-COG #3649 Merchandise Czar
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Offline 2linby

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Carbs clogged up?
« Reply #20 on: May 01, 2009, 06:01:00 pm »
Received my new boots and fuel lines yesterday.(thanks Murph!) Today she rides like the wind!    AKA "2linby" That's 2-lin-by folks!  Northwest Area Director  COG #5539  AMA #927779  IBA #15034  TEAM OREGON MC Instructor    http://community.webshots.com/user/2linby  http://tinyurl.com/njas8 (IBA BunBurner Gold Trip)  http://tinyurl.com/lwelx (Alaska trip)
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Offline ManWorkingHere

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Re: Carbs clogged up?
« Reply #21 on: December 27, 2010, 03:10:28 am »
Hey... I took my carbs out AND put them back in too. And the best part Bob is that you can do it too, without a helmet!

Now I am planning to take out my carbs Tuesday and was wondering.

Do you slide them out the Left side toward the clutch side as you sit on the bike?  Or, do you slide them out the Left side as you face the bike?

Sorry for the simple question, but the Tech home post on carb removal nor the Clymer manual are not clear enough for me on this issue.

I did receive my new carb boots from Murphs on 12/24.  And I asked SISF to be on alert for a package from me next week.  So wish me luck as a carb cleaning Newbie.   >:(
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Offline 2linby

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Re: Carbs clogged up?
« Reply #22 on: December 27, 2010, 04:29:46 am »
Do you slide them out the Left side toward the clutch side as you sit on the bike?  Or, do you slide them out the Left side as you face the bike?

To the left side as you are siting on the bike.

1) Remove the side panels
2) Remove Tank and drain the carbs
3) Remove leftside side cowling cover with glove box
4) Remove air box mounting bolts both sides then loosen and remove air box to carb boots. IN ORDER! DO NOT lose the springs!
5) Pull and lift or spin (swing) the carbs out to the left side and remove the three cables (2 throttle and 1 choke) . Mark the two throttle cables so you put them back correctly

The fun comes when you are putting them back in!  New Boots make everthing sooo much easier. Best of luck!
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Offline Volcantour

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Re: Carbs clogged up?
« Reply #23 on: December 27, 2010, 04:57:49 am »
Carbs are indeed fun.  Just take your time, relax, and be patient.  Beer seems to be tailor-made for the task.  It is, after all a CARB -o-hydrate.  >:D
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Offline Slybones

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Re: Carbs clogged up?
« Reply #24 on: December 27, 2010, 03:16:35 pm »
Wondering if we can use beer to clean the carbs as well as drink during these projects?
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