Author Topic: a couple questions for a concours guru ?  (Read 10380 times)

Offline Steve in Sunny Fla

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Re: a couple questions for a concours guru ?
« Reply #15 on: September 05, 2013, 05:35:16 am »
Obviously there could be a few factors to a cycling idle, but honestly the factory idle isn't anything to write home about from the git-go. The pilot air screws are adjusted very lean, and then capped to be "tamper proof" . Even on totally proper and clean carbs, the idle will be better if the caps are drilled off and the pilots screws set at 2 turns.

Syncing is also important, but needs to be done after a valve adjustment. you may have a tight intake valve causing low vacuum on a given cylinder, and of course that's going to show up as a poor sync and even worse idle / low speed operation. HTH, steve

Offline Summit670

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Re: a couple questions for a concours guru ?
« Reply #16 on: September 05, 2013, 07:14:56 am »
No, the ignition pickups.  I can see the wires coming from the left side of the motor but difficult to see where they go?

The ignition pickups behind the left side engine cover.  There is a gapping spec too, which is easy to check.  I had narrowed down my choices for a running issue I had and when I adjusted the gap it seemed to go away, only to return later.  I figured they got out of adjustment again but checking them revealed not.  I took a shot and ordered new coil pickups.  Very easy install.  Connection, as I recall, is up towards the seat/tank. 

When I had the old unit off, I figured I'd cut it open to see exactly what was inside that might be causing my problem.  When I started hacksawing on it, one of the wires came out of the pickup.  I thought hmm, I may as well pull the other out but tugging on it couldn't budge it so there was no way that first wire should have come out so easy.  Like $115 for new pickup.  This was on an 87 model and I replaced it about 3 years ago with around 70,000 miles.

I'd suspect the carbs need to be pulled and cleaned.  I've never had much luck with the add-to-gas carb cleaners.  I once soaked dirty carb parts in straight STP add-to-gas cleaner (overnight) and figured that would clean them right up and it barely touched them.  I bought the commercial soak (Chem-something) and it cleaned the parts in about 20 minutes.
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Offline DeansZG

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Re: a couple questions for a concours guru ?
« Reply #17 on: September 05, 2013, 10:24:24 am »

  If you're still trying to chase down a vacuum leak, a little shot of carb cleaner around the carb boots & carb assy while its' running, may help pinpoint it a little easier.
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Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #18 on: September 05, 2013, 01:09:31 pm »
Hey Summit, Deans, thanks for replying.

Pulled the tank and checked the vacuum to the aspirator valve and the tank petcock.  No leakage there so I left it alone.  I was able to get a long phillips onto 3 of the 4 carb-side clamps and the right two tightened down a bit - the outside one quite a bit.  Maybe that will help. 

Found the intermediate plug (right where the tank bolts on) and the plug on the ecu.  Resistance to the pickup coils is within spec.  Cleaned the contacts and applied dielectric grease as I reassembled it. 

I'll take it out this evening when it cools off.  Maybe it's fixed.  I started it and it might have sounded better - won't be able to really tell until it's running at operating temp.

Thanks for the tips - we'll figure this out .)

Offline Daytona_Mike

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Re: a couple questions for a concours guru ?
« Reply #19 on: September 06, 2013, 05:47:49 pm »
 :popcorn:
'The carbs were cleaned on the bike with different carb cleaning products.'

I am not going to say one word..not one.
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Offline T Cro ®

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Re: a couple questions for a concours guru ?
« Reply #20 on: September 06, 2013, 06:05:27 pm »
:popcorn:
'The carbs were cleaned on the bike with different carb cleaning products.'

I am not going to say one word..not one.

Just two then? NOT CLEAN ...



Very likely that the slow speed jets and/or their passages are not fully cleared of some gumming debris. These jets are really tiny and once blocked there is just about no chance that any cleaning product will blast through; it usually takes a tiny wire/drill etc to mechanically clear them; also compressed air in volume is an absolute necessity too...
Tony P. Crochet
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Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #21 on: September 06, 2013, 07:23:11 pm »
Yeah - but I just buy new jets, 'cause that wire will change the size...

I agree.  But I'm not gonna rebuild these carbs, then  let 'em sit dry all winter.  I'll just do it before I put it on the road, next spring.  I'll check out the airbox then, too.  That will give me time to get my head together on what I want to do to it, as well.

So the goal for now is just to get it going good enough to ride, and it is.  I don't think the carbs have ever been off the bike so the plugs are likely still in the idle screw holes, too.  And so, maybe the bike is running really good, considering that.

The concours runs great.  I just have to ride it fifteen minutes before it warms up, then it's smoooothe as silk, except at idle.  The bike handles well and, overall, is a joy to ride.  But you gotta watch the thing when the tank is full!  WOAH!

I like the way the bike looks, too.  Never had a blue bike, before - kinda like the color.  I saw one on here that is orange, with darker paint near the edges.  That thing looks great!

There's a funny looking thing under the seat at the back.  Is that the mount for those trunks?  I see they go for like $300... a bit rich for my blood!  I don't like the bags much.  I had them on the bike and they made it so fat it hit the fence, on the way into the back yard!  It didn't look like it would be very hard to rip them off the bike, even if they were locked.  I like to carry some nice camera equipment.  Heck, if I can ride and shoot pictures, too...!  lol


Offline 2fast

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Re: a couple questions for a concours guru ?
« Reply #22 on: September 06, 2013, 08:27:40 pm »
:popcorn:
'The carbs were cleaned on the bike with different carb cleaning products.'

I am not going to say one word..not one.

OK Mike, I'll take it for the team. You are showing amazing restraint!!!  Carbs are finicky. They can NOT be cleaned on the bike. Just trust me on this.......or not. Many have gone before you, and the results are pretty predictable.  If you do not know exactly what you are doing, it is even difficult to do it right OFF the bike. This is why Steve is so friggin busy doing carbs, plus he adds overflow tubes, and sets the critical float levels properly,  and really knows his stuff.
Man, if we each had nickel for every guy that tried to clean his own carbs without knowing how to do it well........we would all be rich!  Money spent with Steve is really a bargain, but don't take my word for it, do the work yourself! When you get a chance to ride a bike that has the carbs right you will be totally amazed at how nice it can be. Mine pulls like silk from about 2 grand up. Typical connies are crap until about 4-5 grand, but they have no idea that this can be cured.
Brian in Minnesota
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Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #23 on: September 07, 2013, 04:38:00 am »
Mine pulls like silk from 1200 up.

I don't need Steve, or anyone else, thank you very much.

I was lurking on another site where I saw how Steve and his pals treat people.  It will be a cold day in hell when I do business with that guy - even if I needed his services, which I don't.

Let me make this very plain.  I will not buy anything.  If that means I am not welcome on here, just say so.

Offline T Cro ®

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Re: a couple questions for a concours guru ?
« Reply #24 on: September 07, 2013, 04:59:54 am »
Mine pulls like silk from 1200 up.

I don't need Steve, or anyone else, thank you very much.
I was lurking on another site where I saw how Steve and his pals treat people.  It will be a cold day in hell when I do business with that guy - even if I needed his services, which I don't.

Let me make this very plain.  I will not buy anything.  If that means I am not welcome on here, just say so.


Don't care anything about what goes on at other sites but you are most certinly welcome here...


BUT copping a tude here will get you absolutely no where!


BTW Steve's responce to you here was both helpful and friendly.......
« Last Edit: September 07, 2013, 06:23:04 am by T Cro ® »
Tony P. Crochet
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Offline gPink

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Re: a couple questions for a concours guru ?
« Reply #25 on: September 07, 2013, 06:17:25 am »
 :o  :popcorn:

So all the guys who have been working on these bikes for over 20 years can pound sand? Seems to be an unusual attitude going around. Just a guess but I think the help has dried up Alphonzo.
Thank God for good men willing to do extreme violence.

Offline 2fast

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Re: a couple questions for a concours guru ?
« Reply #26 on: September 07, 2013, 08:13:58 am »
It does not matter what you buy from anyone. You came asking for some advice and got it.
« Last Edit: September 07, 2013, 11:21:44 am by 2fast »
Brian in Minnesota
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Need Heat Shields for the C-10? 86-93 Front Brake upgrade brackets?  I got em! Click the little green globe under my Avatar on the left.

Offline Daytona_Mike

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Re: a couple questions for a concours guru ?
« Reply #27 on: September 07, 2013, 10:49:14 am »
The carbs were cleaned on the bike with different carb cleaning products.
The above proves that you do need help and you do not know what  your doing even though you think you do.

Mine pulls like silk from 1200 up.
No your bike does not. You stated you have not even synched your carbs after a valve adjust and a so called 'Cleaning'. No stock C10 pulls smoothly. They all have a dip which is clearly seen on a dyno. Do you have any dyno runs to back up your 'smooth as silk statement? Of course you you dont.   I have many and so do many others  here so listen and learn.

If that means I am not welcome on here, just say so.
Fix your attitude. Of course you do not have to buy anything but  you do have to have to conduct your self with a proper attitude.
Listen to those who know and you may learn otherwise you are wasting yours and our time.

Brian- so much for my restraint- gone!
« Last Edit: September 07, 2013, 11:49:11 am by Daytona_Mike »
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Offline MAN OF BLUES

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Re: a couple questions for a concours guru ?
« Reply #28 on: September 07, 2013, 11:53:06 am »
Mine pulls like silk from 1200 up.

I don't need Steve, or anyone else, thank you very much.

I was lurking on another site where I saw how Steve and his pals treat people.  It will be a cold day in hell when I do business with that guy - even if I needed his services, which I don't.

Let me make this very plain.  I will not buy anything.  If that means I am not welcome on here, just say so.



pulls like silk eh....
well to each his own


do you know anything about Shinola?  there's another saying that contains it... but we can't use it here....not allowed...
DIDJA EVER  THINK that Steve, AND his PALS live here also????
so, just like the people on the OTHER site, you are gonna come here and begin Dissing the Guru's as some call them, and get any kind of viable answers to questions you apparently seem to have answers for (in your own mind) as with the other 3 people in the last week "over there"...

go lurk somewhere....

here's a tune to whistle on the way...

oh, we'll (the guys that you dissed) be sending you a complete refund of all the fees you paid to be a member here also... actually we'll include a %50 bonus of that figure in the check, just to ease the pain...   ;)

30 YEARS OF KAW.....

Offline SteveJ.

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Re: a couple questions for a concours guru ?
« Reply #29 on: September 07, 2013, 06:40:58 pm »
Isn't there a new ZG group on Yahoo? This guy could join and double the membership.

Something in the water lately??
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