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Spark plugs look alright?

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Old Jun 2, 2016 | 06:04 PM
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Default Spark plugs look alright?
Can anyone look at these plugs and give your opinion on them as far as to lean, rich ect? I am guessing they need to be changed.





 
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Old Jun 2, 2016 | 06:13 PM
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The one plug/pic I'd be concerned with, maybe just the camera and lighting. I change mine every 5K regardless.
 
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Old Jun 3, 2016 | 07:21 AM
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Originally Posted by jeff6898
Can anyone look at these plugs and give your opinion on them as far as to lean, rich ect? I am guessing they need to be changed.





Looks pretty rich to me.
 
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Old Jun 3, 2016 | 08:09 AM
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Jeff, they look absolutely normal to me for a stock Harley. More than likely it was the back cylinder that had the "whiter" strap, wasn't it? I'd slap you a new set in it and keep on riding.
 
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Old Jun 3, 2016 | 09:42 PM
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I was thinking a little rich. Mine are a little worse than those. I may try to see if I can drop the needle in the carb a little to clean mine up a little.
 
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Old Jun 4, 2016 | 12:00 AM
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You want your plugs to be kinda/sorta more on the brownish side.
 
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Old Jun 4, 2016 | 12:21 AM
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Wire brush, gap and reinstall.
 
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Old Jun 4, 2016 | 06:54 AM
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They look a bit too fluffy-black. Probably should look a little closer to these.

 
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Old Jun 4, 2016 | 07:20 AM
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Originally Posted by Hey Man
They look a bit too fluffy-black. Probably should look a little closer to these.

+1...perfect example. Seldom see that though, you've got your scoot dialed in.
 
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Old Jun 4, 2016 | 08:54 AM
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No, your plugs don't look right; too much carbon build up. You don't say whether your bike is carb' or EFI. Excessive carbon build up can be caused by a motor running too rich, low rpm operation, and not enough wot operation. Also, the white ground makes me think you need a hotter heat range plug. Check the heat range of the current plugs against the factory spec, and replace with correct heat range or go hotter if the current plugs are stock match. Check for rich AFR, make sure air filter is clean, and run that thing at higher rpm. Never hurts to open it up full throttle and take it close to redline at least once a ride, keeps carbon build up down.
 
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