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Old 03-15-2016, 05:55 AM   #1
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Spark plug readers

What do you think of the coloration?

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Old 03-15-2016, 06:08 AM   #2
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How's the gap? Is that from a fuel injected engine? Is the engine running well? Looks good to me if that's from a fuel injected engine.
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Old 03-15-2016, 06:21 AM   #3
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Yes, FI, the grom

Trying to get the AFR dialed in before i melt another piston
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Old 03-15-2016, 06:24 AM   #4
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Quote:
Originally Posted by RACER X View Post
Yes, FI, the grom

Trying to get the AFR dialed in before i melt another piston
How many miles on the plug? Has the gap changed?
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Old 03-15-2016, 06:29 AM   #5
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Prob less then a 1000mi as it came from the last engine build, dunno if the gap has changed
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Old 03-15-2016, 07:40 AM   #6
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Old 03-15-2016, 07:44 AM   #7
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Quote:
Originally Posted by RACER X View Post
Prob less then a 1000mi as it came from the last engine build, dunno if the gap has changed
I'd measure the gap and check it against the factory spec. Only a severe issue would probably show up on a plug with less than 1K on it
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Old 03-15-2016, 07:57 AM   #8
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Quote:
Originally Posted by Bevo View Post
I'd measure the gap and check it against the factory spec. Only a severe issue would probably show up on a plug with less than 1K on it
Yep. With todays fuel it's difficult to get a good reading on plugs.
If you're concerned on afr the correct way would be to temporarily hook up a wide band.
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Old 03-15-2016, 08:16 AM   #9
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I have a wide band, it's reading high (15-16's, seen 20's even). But it's way far away (relative to a grom size) from the exhaust port. The ecu rep. (Finbro) thinks the AFR readings are off because of the location

My bung hole,lol
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Old 03-15-2016, 08:26 AM   #10
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Innovate mtx-l AFR gauge and engine temp guage, lol

Click image for larger version

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Old 03-15-2016, 08:30 AM   #11
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Quote:
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Innovate mtx-l AFR gauge and engine temp guage, lol

attachmentphp?attachmentid91435&ampd1458048401
All that for a Grom?
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Old 03-15-2016, 09:14 AM   #12
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Quote:
Originally Posted by RACER X View Post
I have a wide band, it's reading high (15-16's, seen 20's even). But it's way far away (relative to a grom size) from the exhaust port. The ecu rep. (Finbro) thinks the AFR readings are off because of the location

My bung hole,lol
3e2d158a102d1d124589abe982e05f85
How far downstream is it from the head?
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Old 03-15-2016, 10:22 AM   #13
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Quote:
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All that for a Grom?
I know, right, people are buying alu frames and carbon fiber wheels for these things. I also have my phone/gps on the handlebar too

Patrick at least 18" to 2ft , most o2 ports I've seen are 5-6" away from the exhaust port, dunno what brocks was thinking
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