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 » Wed Sep 16, 2015 9:06 pm



i just changed the spark plugs to E3s. Here is what the old ones look like. Front right and left rear are more wet and fouled. Why would that be?
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wingman12
Posts: 610
Joined: Fri Aug 22, 2014 5:01 pm
Location: Land of Lincoln
Motorcycle: 1999 gl1500 se

Re: Spark plugs

Postby wingman12 » Wed Sep 16, 2015 10:52 pm

That is very little information to work with. Please provide more history, how much riding this year, last plug change, how much time sitting etc. :D :D

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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 » Thu Sep 17, 2015 8:27 am

I ride it everyday it's not raining here, in Missouri, to and from work 10 - 30 miles. On average 50 - 200 miles a week. Only sits in January and February. I have had a lot of exhaust fumes in the morning lately but there wasn't any this morning after the plug change.
I am wondering about the coils (which Ive never messed with). Are those two cylinders on the same coil? And timing belts are on my list for the first too cold to ride stretch this winter.
Thanks
david

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julimike54
Posts: 226
Joined: Sun Feb 01, 2015 12:21 pm
Location: Euless, Texas
Motorcycle: 1986 GL1200A original owner
2016 HD FLTRU

Re: Spark plugs

Postby julimike54 » Fri Sep 18, 2015 7:45 am

Those 2 sparks are not on the same coil (unless the wires are installed incorrectly). It appears that those 2 are running "rich". That condition can be caused by poor spark (everything suspect from coil through plug) or those 2 carbs running rich. The other idea that comes to mind is the other 2 are "lean" making the others to appear to be the problem. I'd start with cold motor, start for a few seconds and carefully check all 4 header pipes to see if they are all the same warmth (ideally check with IR meter). Would also swap everything from the coil out, between the dark plugs to the light plugs, idea is to see if you can "move the problem", if the problem won't "move" it would tend to point to fuel side as the problem.


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