strange arcing

Technical information and Q&A applicable to all years and models of Goldwings
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Posts: 336
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

strange arcing

Postby squirrel » Wed Jan 08, 2014 4:50 pm

hi. started the bike this morning and it sounded like it was only firing on 3 cylinders ran ok if i upped the revs a bit .but the strange thing was the arcing from the rubber spark plug cap on l/s rear plug to metal and this was a constant arcing . not sure what to look at first .( word of advice if this happens to you do not touch the rubber plug cap you will get a shock ) weird any advice welcome thanks

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Posts: 11
Joined: Sun Nov 25, 2012 9:04 pm
Location: Gladstone Qld Australia
Motorcycle: 2010 GL1800

Re: strange arcing

Postby bluewing2010 » Wed Jan 08, 2014 5:46 pm

HI there. The most likely culprit in this is the spark plug cap itself. It has probably cracked and with a bit of moisture collected overnight it will spark to the cylinder head in preference to the spark plug. I don't know how old all the plug wiring is on your bike, but if everything is a few years old, all the rubber boots and the Bakelite caps could be ready for replacement. Your diagnosis of running on 3 cylinders is correct for this type of fault.
Hope this helps.

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