Author Topic: Carbs rebuilt, now won't stay idling (Read 6862 times)

Tews19 · « **on:** July 28, 2011, 07:41:03 AM »

I picked up my bike yesterday and now she won't stay idling... around 1k-1250 when she does idling.. When driving she seems to putter around 2500-3200 rpms.... Other than that she drives great... Any idea's? I will have to bring her back to the shop I think to get adjusted.. I was just wondering what some of you may say may be the cause of this... The bike did do this right away when I got her and I was thinking maybe becuase she was cold and needed time to warm up.. Did 30 miles and she continues to die at idle and today as well.....
I have a BB size hole in the left side upper exhaust , may this effect the it? Sounds dumb, but I was thinking it may have thrown off the carbs...

I must mention that if you give throttle, she will die. This happens most of the time.. I am charging my battery to see if this may be a cause as well.

Duke McDukiedook · « **Reply #1 on:** July 28, 2011, 07:56:11 AM »

What all was done again to the bike besides a carb rebuild, a full tune up should have been done and then probably a carb synch if it is idling rough.

Did you rebuild and clean them yourself or did you farm the work out?

Tews19 · « **Reply #2 on:** July 28, 2011, 08:11:38 AM »

Quote from: Industrial-sized Dukiedook on July 28, 2011, 07:56:11 AM

What all was done again to the bike besides a carb rebuild, a full tune up should have been done and then probably a carb synch if it is idling rough.

Did you rebuild and clean them yourself or did you farm the work out?

Carbs where rebuilt.. I brought it to a shop here in Milwaukee WI that specializes with these bikes... They were bench tested for leaks.. passed....

Bike was then driven and tuned....

The owner told me to call him if I had any questions so I will call before dropping it off...

Nortstudio · « **Reply #3 on:** July 28, 2011, 08:59:24 AM »

If it's not something simple like your idle adjustment, may be your slow jets being clogged??? I mention this because it has happened to me SEVERAL times in te past week!

Duke McDukiedook · « **Reply #4 on:** July 28, 2011, 09:00:22 AM »

OK, have you done a full tuneup? Points, valve clearances, chain tensioner adjusted, plugs checked?

bollingball · « **Reply #5 on:** July 28, 2011, 09:09:10 AM »

Did I miss it did not see what bike (750) or what carbs (pd) (year)??

Tews19 · « **Reply #6 on:** July 28, 2011, 11:43:37 AM »

Its a 78' 550k.. with the pesky carbs that they are known for... The points where adjusted according to the shop.. I did not adjust the valves, will be replacing the spark plugs today..Then bringing it back to the shop..

Nortstudio · « **Reply #7 on:** July 28, 2011, 11:51:30 AM »

Sorry, I was just assuming that the shop would have done the full 3000 mile maintenance routine.

Make sure you have them tell you exactly what they are doing. That way when you check it, and find try never touched that part, you can get your money back

Duke McDukiedook · « **Reply #8 on:** July 28, 2011, 12:01:08 PM »

Or, do like most of us do- do it yourself and make sure it is done and done correctly. This is not rocket science.
I was forced to when all the shops here said they wouldn't touch any bike older than 10 years.

OK, you just missed out on easy money and I will pick up a useful skill- your loss.

flybox1 · « **Reply #9 on:** July 28, 2011, 12:29:24 PM »

+1
Do it all yourself.
heard horror stories of guys dropping $300 for a carb rebuild but come to find that the bike was rode hard with some seafoam in the tank.
is that what your specialty shop meant by 'driven and tuned'?

points were adjusted = we ran brake kleen soaked paper between them a few times

I too assumed "tuned" meant the full meal deal (valves, timing, oil,filters, carbs, cam...etc)
shame on me

time to crack those carbs open and do your bike right

no worries. we'll help.

Tews19 · « **Reply #10 on:** July 28, 2011, 12:52:59 PM »

Quote from: Industrial-sized Dukiedook on July 28, 2011, 12:01:08 PM

Or, do like most of us do- do it yourself and make sure it is done and done correctly. This is not rocket science.
I was forced to when all the shops here said they wouldn't touch any bike older than 10 years.

OK, you just missed out on easy money and I will pick up a useful skill- your loss.

I do plan to learn myself. I read the manual last night.. I have it downloaded to my computer.. My only concern is that it is for a 74 550... Does this matter? I did use the wire diagram last night and early this morning to set up the turn signals and headlight.. This site is great when it comes to information.. I am honestly nervous to touch the engine this soon. She is pristine and now my favorite bike... I sold my KZ650 last night and am down to the 78 550k and my non runner 75 550F.....

I am curious what you meant by "missed out on easy money and I will pick up a useful skill-your loss?"

This is what the 550k looked like when I dropped her up from the shop... You can't see but the headlight is the square one and the turn signals were completely differently with jacked up wiring...

and after looking at the wire diagram provided by the site and fellow members assisting me...

cb550inct · « **Reply #11 on:** July 28, 2011, 01:30:52 PM »

I saw on one of your posts you have no air filter in the air box, have you replaced that yet. That could cause the sputtering.

And if it makes you feel better my bike idles like crap for the first 5 min of running.

Tews19 · « **Reply #12 on:** July 28, 2011, 01:37:48 PM »

Quote from: cb550inct on July 28, 2011, 01:30:52 PM

I saw on one of your posts you have no air filter in the air box, have you replaced that yet. That could cause the sputtering.

And if it makes you feel better my bike idles like crap for the first 5 min of running.

Ah no bud, that is this bike, my 75 550F that has no air filter...

The one that idles horrible is the one you and I hav ebeen communicating about the same brand of tires we both purchased... Which I must state the tires are really nice...

Duke McDukiedook · « **Reply #13 on:** July 28, 2011, 01:38:17 PM »

That is what I basically said to the shops that didn't want to take my money- no problem.
I am not sure if the 550 is like the 750 but the 750 manual covers K0-K8 with addendums, I asume that is how your manual is laid out.

You need some type of a filter in there to get the stock intake resistance pressure correct.
Your bike will only run properly without the filter if it is running rich.

Tews19 · « **Reply #14 on:** July 28, 2011, 01:45:14 PM »

Quote from: Industrial-sized Dukiedook on July 28, 2011, 01:38:17 PM

That is what I basically said to the shops that didn't want to take my money- no problem.
I am not sure if the 550 is like the 750 but the 750 manual covers K0-K8 with addendums, I asume that is how your manual is laid out.

You need some type of a filter in there to get the stock intake resistance pressure correct.
Your bike will only run properly without the filter if it is running rich.

AH I got ya now.. Thanks.. I actually order a carb rebuild kit for the 550F from Z1 today and I will be trying this by myself.. I only have time with these bikes and will learn.. The 550F does have an air filter in there it is the 550F that does not..

cb550inct · « **Reply #15 on:** July 28, 2011, 01:46:13 PM »

Sorry bud I knew I saw a pic with no air filter, Sounds like your bike is too rich, yout tried plugs, have you tried a new air filter. I switched to a uni-fom air filter and the bike runs alot better, Improved air flow over the stock filter....plus i think mine was thirty years old.

Ps. if you get a uni filter, buy the spray oil.

tommytwotone · « **Reply #16 on:** July 28, 2011, 01:50:24 PM »

Where did you find the uni filter? Do they make one for the 500? Tried to find K&N but had no luck. I've had the same problem on my 500, I just keep cleaning the carbs and she runs good for a while then starts missing again at idle.

cb550inct · « **Reply #17 on:** July 28, 2011, 01:57:19 PM »

I got the filter for 25 and the spray oil and cleaner for 12......amazon shop around there.

Uni nu-4055 filter

Tewes were your tires slippery for the first 50 miles. .....and +1 on the tires i love them

Tews19 · « **Reply #18 on:** July 28, 2011, 06:07:24 PM »

Hmm im not sure. Yesterday it rained for the most parts. Not sure if that played a role but ya.

Stev-o · « **Reply #19 on:** July 28, 2011, 09:29:48 PM »

You really need to do the full 3000 mile tune up. Otherwise, you'll be running in circles trying to find the issue.
If you bring it back to the shop, specify that you need it, don't let them tell you differently. Trust me, we know more than them (or your bike would be running perfect).
Bring the tune up info with you.
I'm very disappointed they gave you your bike back like that!

Nortstudio · « **Reply #20 on:** July 29, 2011, 04:19:17 AM »

Quote from: Stev-o on July 28, 2011, 09:29:48 PM

You really need to do the full 3000 mile tune up. Otherwise, you'll be running in circles trying to find the issue.
If you bring it back to the shop, specify that you need it, don't let them tell you differently. Trust me, we know more than them (or your bike would be running perfect).
Bring the tune up info with you.
I'm very disappointed they gave you your bike back like that!

+1

bollingball · « **Reply #21 on:** July 29, 2011, 05:33:01 AM »

If you MUST take it to the shop mark a few screws here and there so you can tell if they have been moved

Most shops don't have a clue about these bikes. If it is not to personal how much did they charge? If you mess with it now they may not cover there work claiming that you messed it up.

Ken

Tews19 · « **Reply #22 on:** July 29, 2011, 09:50:29 AM »

Quote from: bollingball on July 29, 2011, 05:33:01 AM

If you MUST take it to the shop mark a few screws here and there so you can tell if they have been moved Most shops don't have a clue about these bikes. If it is not to personal how much did they charge? If you mess with it now they may not cover there work claiming that you messed it up.

Ken

475 for a complete carb rebuild. I contacted the shop and the owner is really understanding. He told me to bring it back and they will take care of it... I am pretty they specialize specifically with these type of bikes... Been around for 16 years and people who informed me of the shop only have high praise... Take a look.. here is their link---------------
http://www.theshopmilwaukee.com/

Eitherway I have been doing nothing but reading late at night the manual and will start to wrench on her myself once the carb issue is resolved.. Quick question, the manual this site has is a 74 550... Are the schematics the same for my 78?

Duke McDukiedook · « **Reply #23 on:** July 29, 2011, 11:21:51 AM »

Oh damn, that is a little expensive for a carb rebuild, but it is not my money.
We could coach you through what ever process you want to do (on your own).

Like I said, these bikes ar not rocket science, if you can read and follow written directions and get a few tools you are most of the way there. The remaining components are time, patience and a decent workspace.

Tews19 · « **Reply #24 on:** July 29, 2011, 12:33:53 PM »

Quote from: Industrial-sized Dukiedook on July 29, 2011, 11:21:51 AM

Oh damn, that is a little expensive for a carb rebuild, but it is not my money.
We could coach you through what ever process you want to do (on your own).

Like I said, these bikes ar not rocket science, if you can read and follow written directions and get a few tools you are most of the way there. The remaining components are time, patience and a decent workspace.

Ya I know it was very expensive compared to a complete rebuild for my kz650--$220...

The bike was in such good shape when I got her I did not want to mess her up.. I think I may have fixed the problem though.....

I turned the idle screw and for now that seems to help... I had handle bar extenders on the bike and removed it.. I think I need to replace the throttle cables because the idle seems to be sticking on longer drives.. Is this a possiblity? The idle does take a little longer to come down when I am shifting down to come to a stop.. Other then that she drove great today....

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Author Topic: Carbs rebuilt, now won't stay idling (Read 6862 times)

bollingball

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