Bad spark?
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Joined: Sep 2006
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From: UK
Bad spark?
Not sure if this should go under electrical or engine related, but here goes.
Just done the 15k service. \\; On checking the spark plugs I find that the rear cylinder plug looks fine, but front cylinder plug has substantial black sooty deposits. \\; \\; Correct me if I am wrong but black sooty deposit means running rich or not getting a good spark. \\; The bike is a 2005 Standard with EFI, so I can't see it being a fuel mixture problem on one cylinder only. \\; I have checked the plug cable - no obvious damage. \\; Checked the resistance of the cable and it is at the low end of the range in the manual but just in the range. \\; (cable for rear cylinder is also at the low end of the range).
I changed the plugs at the 10k service, so there is only 5k on the plug. \\; I have spoken to the guy at the local independent, and he can offer no suggestions other than checking what I already checked. \\;
Any suggestions?
Just done the 15k service. \\; On checking the spark plugs I find that the rear cylinder plug looks fine, but front cylinder plug has substantial black sooty deposits. \\; \\; Correct me if I am wrong but black sooty deposit means running rich or not getting a good spark. \\; The bike is a 2005 Standard with EFI, so I can't see it being a fuel mixture problem on one cylinder only. \\; I have checked the plug cable - no obvious damage. \\; Checked the resistance of the cable and it is at the low end of the range in the manual but just in the range. \\; (cable for rear cylinder is also at the low end of the range).
I changed the plugs at the 10k service, so there is only 5k on the plug. \\; I have spoken to the guy at the local independent, and he can offer no suggestions other than checking what I already checked. \\;
Any suggestions?
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Joined: Sep 2006
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From: UK
RE: Bad spark?
I don't have any fuel management device. \\; I have been considering a power commander, but not got there yet.
I changed the plugs yesterday, and will try testing for leaks tomorrow all being well. \\; Wanted to do it today but its my youngest's birthday party today so I won't have time.
The manual suggests using propane to test for leaks, but I have heard of folk using WD40. \\; Anyone tried with WD40? \\; Seems that I would be less likely to torch myself or the bike with WD40 than with propane!
I changed the plugs yesterday, and will try testing for leaks tomorrow all being well. \\; Wanted to do it today but its my youngest's birthday party today so I won't have time.
The manual suggests using propane to test for leaks, but I have heard of folk using WD40. \\; Anyone tried with WD40? \\; Seems that I would be less likely to torch myself or the bike with WD40 than with propane!
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Thread Starter
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Joined: Sep 2006
Posts: 71
Likes: 0
From: UK
RE: Bad spark?
Tested for leaks this morning using the WD40 method, but found nothing. \\;
I am going to see how the new plugs fare - I think that is the only way to establish that it was just a bad plug.
I am going to see how the new plugs fare - I think that is the only way to establish that it was just a bad plug.
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