Plug reading

kirkallen143 · 10-13-2018, 11:47 AM

What your critique on this plug? It's the NGK Iridium dr8eix, thanks.

Kirk

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Ac21 · 10-13-2018, 12:04 PM

I would say lean

Ariel Red Hunter · 10-13-2018, 10:14 PM

Quote:

Originally Posted by kirkallen143

What your critique on this plug? It's the NGK Iridium dr8eix, thanks.

Kirk

Attachment 14440

Attachment 14441

I think the bottom (over exposed) picture makes it look like it is too lean. The upper picture looks good at the center electrode, but the plug body looks like it was too rich at some point. Did you have the choke on too long?..ARH

kirkallen143 · 10-14-2018, 11:00 AM

That overly rich condition I believe is a pilot jet drilled to 0.0185" (measured), and I set the fuel mixture screw to 1 1/2 turns out and left it there. Most of my riding at the house has been 1/4 throttle or less while break-in. I have not adjusted the fuel mixture screw since. Don't mind it a little rich down low, cold it starts right up 1/2 choke every time. This is what I use to read plugs, best I have found so far...

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Name: plug reading.jpg
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Kirk

Ariel Red Hunter · 10-14-2018, 12:32 PM

Quote:

Originally Posted by kirkallen143

That overly rich condition I believe is a pilot jet drilled to 0.0185" (measured), and I set the fuel mixture screw to 1 1/2 turns out and left it there. Most of my riding at the house has been 1/4 throttle or less while break-in. I have not adjusted the fuel mixture screw since. Don't mind it a little rich down low, cold it starts right up 1/2 choke every time. This is what I use to read plugs, best I have found so far...

Attachment 14451

Kirk

That's a great chart. It illustrates what we've been trying to explain for years...

Ariel Red Hunter · 10-14-2018, 12:40 PM

Quote:

Originally Posted by kirkallen143

That overly rich condition I believe is a pilot jet drilled to 0.0185" (measured), and I set the fuel mixture screw to 1 1/2 turns out and left it there. Most of my riding at the house has been 1/4 throttle or less while break-in. I have not adjusted the fuel mixture screw since. Don't mind it a little rich down low, cold it starts right up 1/2 choke every time. This is what I use to read plugs, best I have found so far...

Attachment 14451

Kirk

If you have good lively power right off of idle to 1/4 throttle you're good to go. If it is at all "wooly or soft" coming up, try leaning the mixture screw 1/8th of a turn at a time....ARH

**JerryHawk250** · 10-15-2018, 05:42 PM

Just reading your plug tells me you're Hawk is going to have a long life and happy life.

Looks good

10-13-2018, 11:47 AM	#1
kirkallen143 Join Date: May 2015 Posts: 84	Plug reading What your critique on this plug? It's the NGK Iridium dr8eix, thanks. Kirk
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10-14-2018, 11:00 AM	#4
kirkallen143 Join Date: May 2015 Posts: 84	That overly rich condition I believe is a pilot jet drilled to 0.0185" (measured), and I set the fuel mixture screw to 1 1/2 turns out and left it there. Most of my riding at the house has been 1/4 throttle or less while break-in. I have not adjusted the fuel mixture screw since. Don't mind it a little rich down low, cold it starts right up 1/2 choke every time. This is what I use to read plugs, best I have found so far... Kirk
	2

10-15-2018, 05:42 PM	#7
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,569	Just reading your plug tells me you're Hawk is going to have a long life and happy life. Looks good __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
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10-13-2018, 12:04 PM	#2
Ac21 Join Date: Jun 2018 Posts: 54	I would say lean
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