Spark Plug Color - Yamaha Star Stryker Motorcycle Forum
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Old 06-18-2017, 09:35 PM   #1 (permalink)
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Default Spark Plug Color

Hello Strykers,

I'm wondering if my engine has been running good since I changed pipes, air filter and added EJK fuel controller. I took spark plugs out today and took a couple of pictures. Can someone experienced tell me if color looks ok or not?

Thanks!
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Old 06-18-2017, 11:03 PM   #2 (permalink)
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Maybe a pinch lean but looks fine to me. How many miles?
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Old 06-18-2017, 11:17 PM   #3 (permalink)
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Maybe a pinch lean but looks fine to me. How many miles?
About 1500 since I changed the pipes and installed EJK. And roughly 750 since I modified the air intake. 8550 total.

EJK is at EJK recommended settings right now (1.5-4-0.5). Should I boost it up?
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Old 06-18-2017, 11:22 PM   #4 (permalink)
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I'd say it looks pretty good. It'll be ash colored all over the plug if your running really lean. Too rich is a dark black tar color. I'd pull them again in another 2k just to check.
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Old 06-18-2017, 11:24 PM   #5 (permalink)
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Originally Posted by gerdawg View Post
I'd say it looks pretty good. It'll be ash colored all over the plug if your running really lean. Too rich is a dark black tar color. I'd pull them again in another 2k just to check.
Thanks a lot, man! I'll keep an eye on it.
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Old 06-18-2017, 11:24 PM   #6 (permalink)
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Here's a good reference

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Old 06-18-2017, 11:28 PM   #7 (permalink)
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Here's a good reference

Now I see. Thanks again!
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Old 06-18-2017, 11:31 PM   #8 (permalink)
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Now I see. Thanks again!
Anytime!
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Old 06-19-2017, 09:24 AM   #9 (permalink)
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They look fine to me.
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Old 06-19-2017, 10:09 AM   #10 (permalink)
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They look fine to me.
Thanks man!
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