Spark plugs


Information and questions on GL1200 Goldwings (1984-1987)
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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

Spark plugs

Postby filupsd » Fri Dec 07, 2012 11:29 am



I have looked at the "how to read your spark plugs" article but still have a question since I am still learning. I have pulled mine and they are covered in black soot. Is that a sign that It is running way too rich? I have been having trouble with my choke cable so I have a new one I hope to install and then balance the carbs. Should I install new plugs before balancing or after?

Any tips on changing the choke cable would be appreciated also.

Thanks
David



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virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Spark plugs

Postby virgilmobile » Fri Dec 07, 2012 12:26 pm

Plug condition won't affect carb sync,Either way is OK
Black soot on ALL the plugs or just a couple?
If there all sooty,the most likely cause is the fuel enricher valves (choke)are still open a bit.
Look at one of the carbs when you operate the choke.You'll see a fork lever pull on a plunger.When the "choke" is returned back,the fork must allow the plunger to completely seat back into the carb body.There should be free play between the fork and the plunger.
If the "choke" cable is sticking,it can keep the plungers open a bit.
On my 84,I removed the carbs.
I started on the carb assembly and found it was the cause.Most of the moving linkages were gummed up and the spring couldn't pull the mechanism an plungers closed.The cable was OK,but I lubed it anyways,still on the bike

Take pictures too....We all like pictures. :)

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thrasherg
Posts: 1838
Joined: Tue Oct 20, 2009 11:21 am
Location: Plano, TX
Motorcycle: 2004 GL1800, 2005 Honda Shadow 750, 2008 Yamaha R6 with RG500 engine, CRF450X, CRF230, CRF250X, XR200, CR500

Re: Spark plugs

Postby thrasherg » Fri Dec 07, 2012 1:33 pm

Just to make sure we are not missing the obvious, you had taken the bike out for a good ride (Got it good and hot) before you checked the plugs? If you had just started it, you would have used the choke and the plugs will be black!! The best time to check the plugs is after a good long ride.. If the plugs are black and sooty, then yes it is too rich, it could be that the choke mechanism is not turning off completely (so check the choke mechanism before playing with the jets..

Gary

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filupsd
Posts: 59
Joined: Fri Sep 07, 2012 1:07 pm
Location: Rolla, Missouri
Motorcycle: 1984 GL 1200 Standard

Re: Spark plugs

Postby filupsd » Sat Dec 08, 2012 11:02 pm

I need to ask a silly question since I am learning where things are as I go. I removed the Air cleaner and the box but there is still the botom of the boo in the way of seeing anything. I can not trace the choke cable because it goes under that plate. Am i going at it the wrong direction? Can I get to the engine end of the cable from the side? Or am I missing something obvious? I didn't think it would be a big deal to change out the cable but I'm learning it's not the same as a 75 Olds. Things are a lot more compact.

By the way the spark plugs have been sooty each time I've looked at them.

User avatar
virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: Spark plugs

Postby virgilmobile » Sun Dec 09, 2012 11:30 am

Your not missing anything.With the advent of computer cad programs,things get more difficult to service.
Sorry but the carbs have to come off the bike.Think of it as spending quality time with her.
Success is in the details.When you " service " the carbs,double check everything.All it takes is one bound control arm to botch it up.
It's gonna take a good day to do this.




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