Replacing plugs Stopped Decel Popping. - Victory Forums - Victory Motorcycle Forum
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post #1 of 30 (permalink) Old 01-13-2019, 06:04 PM Thread Starter
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Thumbs up Replacing plugs Stopped Decel Popping.

Ok This is a little weird, but I had mentioned before I was having decel popping on this new to me 2014 XC. Yesterday I changed my plugs to the NGK DCPR6EIX Iridium just as general maintenance to the XC and now the decel popping seems to be gone.
Now the old plugs were way out on the gap at 45 thousands and I gapped the new plugs at 33. So I don't know if the decel popping was from the plugs being old or too big of gap, or both. All I know is it was totally unexpected to get this result.
The old plugs look good and tan so I know the burn was clean but I have a feeling the big gap was causing this popping. I thought about re-gapping the old plugs to try if it also helps but I'm just being too lazy to do it right now.

Maybe this will help someone having a similar issue.

Current Stable: 2014 XC, Honda PCX 150, 125 SYM Havana.

Born in the deepest jungles of India, I was raised by a friendly bear, until I was kidnapped by a pack of unruly baboons who taught me the finer points of swing jazz, all the while being stalked by an incompetent python and an evil but mis-understood tiger... Ummm, wait a minute, that's the Jungle book, no I was raised just outside of St. Louis, But...in the deepest jungles of a middle class neighborhood .
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post #2 of 30 (permalink) Old 01-13-2019, 06:48 PM
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Vic's are gap sensitive. I found that out on my KP a while back. They need to be right or at least within a close tolerance.

Thanks for bringing this up for others who may be having a similar issue. Gapping plugs takes just a few minutes. Be sure to use anti-seize.
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post #3 of 30 (permalink) Old 01-13-2019, 09:43 PM
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Quote:
Originally Posted by Jakvis View Post
Ok This is a little weird, but I had mentioned before I was having decel popping on this new to me 2014 XC. Yesterday I changed my plugs to the NGK DCPR6EIX Iridium just as general maintenance to the XC and now the decel popping seems to be gone.
Now the old plugs were way out on the gap at 45 thousands and I gapped the new plugs at 33. So I don't know if the decel popping was from the plugs being old or too big of gap, or both. All I know is it was totally unexpected to get this result.
The old plugs look good and tan so I know the burn was clean but I have a feeling the big gap was causing this popping. I thought about re-gapping the old plugs to try if it also helps but I'm just being too lazy to do it right now.

Maybe this will help someone having a similar issue.
Quote:
Originally Posted by BBob View Post
Vic's are gap sensitive. I found that out on my KP a while back. They need to be right or at least within a close tolerance.

Thanks for bringing this up for others who may be having a similar issue. Gapping plugs takes just a few minutes. Be sure to use anti-seize.
you guys made me look. I found the gap setting should be .031 - .035 inchs. Great stuff. Will have to look into my Highball. Thanks! LMYR
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post #4 of 30 (permalink) Old 01-15-2019, 11:03 AM
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You know after reading this it made me think about the last time I changed my plugs. It was 2 years ago and I was making a run to Colorado, did 9 mountain passes. My scooter had been popping now and then, but after changing the plugs it hardly ever does it and going down mountain passes is a prime time for popping exhaust. So you maybe on to something here.
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post #5 of 30 (permalink) Old 01-15-2019, 01:20 PM
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I've had my Iridium plugs in for 50K miles and still no popping. Planning on changing out the plug wires with aftermarket soon and maybe finally put in new plugs. I'd be interested to see where the gap is at.

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post #6 of 30 (permalink) Old 01-15-2019, 01:50 PM
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Rylan at the vic shop says changes plugs once a year cause of the heat. Auto stores sell NGK there p/n 3481 that will give you DCPR6E two for $7 bucks.
Rylan all so said iridium will not give you any benefit whats so ever

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post #7 of 30 (permalink) Old 01-15-2019, 02:23 PM Thread Starter
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Quote:
Originally Posted by visionjohnny View Post
Rylan at the vic shop says changes plugs once a year cause of the heat. Auto stores sell NGK there p/n 3481 that will give you DCPR6E two for $7 bucks.
Rylan all so said iridium will not give you any benefit whats so ever
I only paid a couple bucks more each for the Iridium plugs but here is some information based on a quick Google search.

Iridium Spark Plugs have some significant advantages over spark plugs made using other metals. They have better performance and more complete combustion than platinum-tipped spark plugs. Iridium has an outstanding longevity, so you won't have to change the spark plug so frequently.
Iridium vs Platinum Spark Plugs — Howrah.org
Iridium vs Platinum Spark Plugs ? Howrah.org

Or this

Iridium Spark Plugs have some significant advantages over spark plugs made using other metals. They have better performance and more complete combustion than platinum-tipped spark plugs.

Iridium has an outstanding longevity, so you won't have to change the spark plug so frequently. Iridium spark plugs are quite consistent and wear-resistant. So, in general, iridium spark plugs allow you to have a lifespan of platinum and performance comparable to copper. Commonly it's not recommended to gap iridium spark plugs, as this metal can be damaged during the process.

Iridium vs Platinum Spark Plugs ? Howrah.org

I think the higher melting point and longevity alone makes up the difference in cost for the iridium plug. I might be wrong but I'll use the iridium.
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Current Stable: 2014 XC, Honda PCX 150, 125 SYM Havana.

Born in the deepest jungles of India, I was raised by a friendly bear, until I was kidnapped by a pack of unruly baboons who taught me the finer points of swing jazz, all the while being stalked by an incompetent python and an evil but mis-understood tiger... Ummm, wait a minute, that's the Jungle book, no I was raised just outside of St. Louis, But...in the deepest jungles of a middle class neighborhood .
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post #8 of 30 (permalink) Old 01-16-2019, 08:56 PM
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These NGK Iridium plugs are in Toyota's stock from the factory. They are 120k mile plugs. My new ones from Amazon are gapped at .033 ....our 106's. spec is low as .032. Old ones were 34 and 36

Since we are advancing timing with the timing wheel and other methods. I can assure you a tighter spark plug gap is going to advance your timing. Ill take an Iridium plug over anything else every time. Motorcycles are more sensitive and I don't understand why running a better plug wont make a difference.

I just finally installed a set in mine with the thundervolt wires.
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post #9 of 30 (permalink) Old 01-17-2019, 07:53 AM
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I have 50K on my iridium plugs and I'm thinking why change them? Bike runs perfect. Would like to get some aftermarket red plug wires!

2013 Victory XCT. Lakewood, CA

Russell Day Long Saddle.
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Unplugged O2 sensors.
Stage one filter.
14" replacement ant.
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post #10 of 30 (permalink) Old 01-17-2019, 11:24 AM
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Quote:
Originally Posted by Blowndodge View Post
I have 50K on my iridium plugs and I'm thinking why change them? Bike runs perfect. Would like to get some aftermarket red plug wires!
Like these??
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