Is it worth installing equivalent NGK irridium spark plug in a Honda 420 rancher? - Honda ATV Forum
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post #1 of 10 (permalink) Old 03-01-2011, 03:39 PM Thread Starter
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Is it worth installing equivalent NGK irridium spark plug in a Honda 420 rancher?

Is it worth installing equivalent NGK irridium spark plugs in a Honda 420 rancher?

I am considering equivalent spark plugs to help with cold climate,fuel economy, and farm work HP.

Either Bosch Supers, or NGK Irridium.


The stock 09 honda rancher 420 efi spark plug is a: NGK BKR5E-11

The irridium version is NGK BKR5EIX-11.


Any thoughts?
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post #2 of 10 (permalink) Old 03-01-2011, 04:00 PM
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Quote:
Originally Posted by nanuk View Post
Is it worth installing equivalent NGK irridium spark plugs in a Honda 420 rancher?

I am considering equivalent spark plugs to help with cold climate,fuel economy, and farm work HP.

Either Bosch Supers, or NGK Irridium.


The stock 09 honda rancher 420 efi spark plug is a: NGK BKR5E-11

The irridium version is NGK BKR5EIX-11.


Any thoughts?
Supposedly, the Iridiums last longer than regular plug. My thoughts are, it's probably just another gimmick. My 450ER actually calls for a laser iridium, so that's all that is going into it. I don't see where the cost will outweigh the benefit, but that is totally up to you. If my quad calls for a normal plug, that's all that is going into it. No Bosch or any other. NGK all the way!

UPDATE: I just looked up NGK and this is what it says... if all of it is true, then maybe they are worth it! I'd like to see a test done before I believe it though! Mythbusters anyone? LOL

http://www.ngksparkplugs.com/product...er_iridium.asp

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post #3 of 10 (permalink) Old 03-01-2011, 04:09 PM Thread Starter
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Quote:
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Quote:
Originally Posted by nanuk View Post
Is it worth installing equivalent NGK irridium spark plugs in a Honda 420 rancher?

I am considering equivalent spark plugs to help with cold climate,fuel economy, and farm work HP.

Either Bosch Supers, or NGK Irridium.


The stock 09 honda rancher 420 efi spark plug is a: NGK BKR5E-11

The irridium version is NGK BKR5EIX-11.


Any thoughts?
Supposedly, the Iridiums last longer than regular plug. My thoughts are, it's probably just another gimmick. My 450ER actually calls for a laser iridium, so that's all that is going into it. I don't see where the cost will outweigh the benefit, but that is totally up to you. If my quad calls for a normal plug, that's all that is going into it. No Bosch or any other. NGK all the way!

UPDATE: I just looked up NGK and this is what it says... if all of it is true, then maybe they are worth it! I'd like to see a test done before I believe it though! Mythbusters anyone? LOL

NGK Laser Iridium® Spark Plugs
There are some significant differences between spark plug brands. My Kawasaki was so weak on stock champion plugs. However i put in a NGK BR8ES and what a difference.

My concern with the rancher is the ability to burn the fuel better (more completely) at lower outside temepratures.

Well if it's not too expensive i'l give the irridium a try, and post some results.

It's only one spark plug.

BTW I would not recommend the e3 E-48 spark plugs. While they do perform very well . They do not last for very long .

I agree that NGK are hard to beat.
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post #4 of 10 (permalink) Old 03-01-2011, 10:18 PM
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thats all we use at work in our honda engines but we pull out the stock ngk bpr6es and replace with bpr2es, they run like a scolded dog!! but they are hondas!
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post #5 of 10 (permalink) Old 03-03-2011, 11:45 AM Thread Starter
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Hi.

Well for those who might wish to know.

It's 25$ (CDN) for two Honda rancher 420 efi iridium spark plugs.
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post #6 of 10 (permalink) Old 03-03-2011, 12:57 PM
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I always run what the manual says to... The engine was designed using that plug so why mess with it?

Rob

I've owned several Hondas over the years, with 2, 3 and 4 wheels.
Currently have a 1979 ATC 110 and 1985 XL350R enduro.
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post #7 of 10 (permalink) Old 03-03-2011, 03:48 PM
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Service manual gives three choices for a TRX300.
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post #8 of 10 (permalink) Old 03-03-2011, 04:09 PM Thread Starter
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Quote:
Originally Posted by Rayzur View Post
Service manual gives three choices for a TRX300.
Thank You Rayzur.

Yes i agree. The manual of the rancher 420 does not have a "cold climate" chart.

As i stated before in other sub forums. I had to get an efi programmer to fix my honda's fuel and temperature settings as they were set for somewhere in the southern US. Before the reprogramming it was getting about 3-5mpg until the engine got very hot.

Now it no longer guzzles gas.

Same goes for the spark plug. Need something that is designed for a much more inhospitable climate including 900-1800 feet above sea level.

Last edited by nanuk; 03-04-2011 at 10:38 AM.
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post #9 of 10 (permalink) Old 03-23-2011, 02:40 PM Thread Starter
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Hi.

Well there is a significant difference in cold starting with the NGK iridium spark plugs.

Takes about half the time to start up from a frozen solid state when compared to the v-power plugs.

Interesting.

Next will be a power test, then fuel economy, based on my PGI baseline retuning.

Safe Journey.
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post #10 of 10 (permalink) Old 03-23-2011, 03:49 PM
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Too early to tell BUT I've just gone to NGK iridiums in all 4 machines, my theory is newer is better, they didn't have this technology in 1985 when my 125 was born and I'm sure it will love it.

Bought them on ebay from seller "sixity" from $7 and change to $12 depending on machine, only charges $1.99 shipping on the first plug then free for additional items. Unfortunately sells only to USA, doesn't advertise on ebay.ca.

When you only have one cylinder the plug should be as good as it gets.

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Last edited by Ballast; 03-23-2011 at 07:57 PM.
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