Author Topic: a couple questions for a concours guru ?  (Read 10382 times)

Offline Alphonzo

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a couple questions for a concours guru ?
« on: September 04, 2013, 07:26:50 pm »
Some history - bike has new major tuneup - plugs, wires, valve adjustment.  Carbs have been thoroughly cleaned on the bike and work great, except for idle.  Bike has 21,000 miles and runs great, gets great mileage and will really move out, if pushed.  There was a hesitation right off idle but the can of sea foam took care of that.

The idle is, well, weird.  It seems to rumble.  The tach cycles, running slower then faster in regular rithum.  It seems to have a vacuum leak and, if it was a car, that's what I'd be checking. 

I cleaned the vacuum valve that lets air into the exhaust.  Of everything I see, that seems to be the one possibility that could cause a cycling, rumbling miss.  Are those things known to go bad?  What happens if you just disconnect it, and plug the vacuum line?

I'll bet somebody that has had a lot of experience with the concours can tell me what's wrong right away.  I sure would appreciate it.

Oh, and can I get a brighter headlight bulb?  What bulb should I buy?

Offline Summit670

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Re: a couple questions for a concours guru ?
« Reply #1 on: September 04, 2013, 08:30:17 pm »
I don't claim to be a guru. 

If a shop did the major tune up and the bike doesn't run right, I'd think about taking it back to them.

If there was a slight hesitation after the carb cleaning, and a can of sea foam seemed to take care of it, then I would question how thorough the carbs were cleaned and maybe they need to be cleaned again.

I'm guessing you bought this bike used.

Did the bike exhibit this trait prior to the tune up and did that make any diff?

I'd make sure all the vac lines are attached and in good condition, as well as checking the carb to boot clamps.

You didn't say if the carbs had been synced.

What year is the bike because if older you could have a coil pickup problem.  I did, where one of the wires was intermittently losing contact at various rpms.

I'm not sure what you mean by vacuum valve.  I'm not aware of anything that lets air into the exhaust.

Brighter headlight bulb - I'm not sure if there is a Silverstar option but I heard those are good but the life is shorter.  There is another option to go to a higher wattage bulb but I believe to be safe you will want to replace the headlight wiring harness or something to prevent it from melting.  I believe Murphs Kits has a kit. http://www.murphskits.com/catalog/product_info.php?cPath=1_28&products_id=102
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Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #2 on: September 04, 2013, 08:45:41 pm »
  It's possible to remove the whole vacuum system with these.

         http://www.zggtr.org/index.php?topic=99.msg595#msg595

   gets rid of a crap under the tank.
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #3 on: September 04, 2013, 08:51:44 pm »
Hey Mettler1 - thanks for replying.

No shop works on my bike.  I almost got killed once 'cause of making that mistake.  NEVER AGAIN!  All I get done now is tires mounted, 'cause I don't have a balancer, and that scares me to death!

The carbs were cleaned on the bike with different carb cleaning products.  If I absolutely have to I will rebuild them next spring - not much sense in doing that at the end of the season.  I am waiting to get everything else ironed out first, then I will synch the carbs.

Yeah, it was doing this from the start and it has gotten better, but not gone away.

It's a 2001

The thing is called the PAIR system.  http://i247.photobucket.com/albums/gg136/hoggone/Concours%20pictures/027_zps4bb1662d.jpg  - A pic of where it goes, but this guy removed it.

I found the headlight info in another post.

Where was the pickup wire losing contact?  At the pickup?  Oh, I hope not, cause all that plastic would have to come off again...  I have thought of finding and cleaning the place where the pickup wires plug in but have yet to do so.  Do you know where that is?

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #4 on: September 04, 2013, 08:56:59 pm »
  Wanna know about carbs on the Concours?  Steve in Sunny Florida has gotten them down pat.

   Here is his website for some good reading.

          https://sites.google.com/site/shoodabenengineering/

             https://sites.google.com/site/shoodabenengineering/intake-and-exhaust

'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #5 on: September 04, 2013, 09:03:32 pm »
  Also forgot to add about hydrolock  and overflow tubes on the carb bowls. Good reading and could save you a destroyed engine.  Info also on Steve's website.
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #6 on: September 04, 2013, 09:05:35 pm »
I do believe that you can get a used set of bowls from the voyager 12 which are a direct replacement, and they have the overflow tubes.

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #7 on: September 04, 2013, 09:11:37 pm »
  Yes you can if you can find them. I never looked as I already have Steve's but have heard the kind of rare. If you find a source, grab'em!
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #8 on: September 04, 2013, 09:20:03 pm »
  I'm assuming you mean the pickup wire for the tach. My tach works fine so I never had to look for it. ::)

   Idle is the Concours weak spot from idle (1100 rpm) to about 3000 rpm. You will find that on Steve's website also.
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #9 on: September 04, 2013, 09:22:41 pm »
No, the ignition pickups.  I can see the wires coming from the left side of the motor but difficult to see where they go?

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #10 on: September 04, 2013, 09:27:33 pm »
No, the ignition pickups.  I can see the wires coming from the left side of the motor but difficult to see where they go?
yes the pickups are behind that cover. I assume they were for ignition only but you are right as they probably go to the tach also.
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Alphonzo

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Re: a couple questions for a concours guru ?
« Reply #11 on: September 04, 2013, 09:29:16 pm »
Yeah, where were the wires loose on those pickups?

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #12 on: September 04, 2013, 09:39:51 pm »
  I assume that if there were loose wires in there in would also effect ignition also. Last time I was in there all I found was the pickups and the wires went directly out. When it comes to electricity I only know the pain when I grab the wrong one!! :o
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #13 on: September 04, 2013, 09:43:42 pm »
  As far as a brighter bulb I use an 80/100 watt with Murphs' headlight relay kit.uses heavier wire and plug for less resistance and heat.
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc

Offline Mettler1

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Re: a couple questions for a concours guru ?
« Reply #14 on: September 04, 2013, 09:52:43 pm »
  I mentioned "hydrolock" early and don't know if you have heard of it but is a video that explains it.

       
Concours ZG1000 hydrolock rod test
'94 Concours 112,000 miles-- 7th gear,2MM,KB fork brace,Over flowtubes,Stick coils,Tcro shifter,GPS,Torque cams,SPOOKFAK,block off plates, SS brake & clutch lines,KB risers, FENDA EXTENDA, emulators,etc