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  #1 (permalink)  
Old 04-12-2012, 11:12 AM
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Default Spark Plugs

I did a search on spark plugs and the only thread I found was from 2009.
They talked about the E3 and Iridium plugs. It's 2012 now so I was wondering how those plugs have worked? It's time to change the plugs in my 07 and want the best I can get. There was some talk about them running hotter and am concerned about that.
Any opinions are greatly appreceated (sp) Thanks
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Old 04-12-2012, 01:00 PM
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My personal advice is unless you have done some major engine mods such as head work or a big block kit ect., then I would suggest you just stick with the standard NGK that Yamaha engineers designed the motor to run on. No need to go changing heat range or use some fancy metal with 5 electrodes IMO...
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Old 04-12-2012, 01:01 PM
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Default The evel one

I run the regular old NGKs...Any parts house worth it's salt should have them cheaper than the dealership...

While attending a drag race a few years back I watched as Allen Johnson read the plugs from his Top Fuel Dragster...He handed me one and it was just the regular old Champion Copper Plus...My take on that...If the plug hype had any basis surely the most tricked out engine on the planet would be running them...

The E3...Now it may be a fine addition but IMO there is just way too much going on there...Looks too me like the the ground strap could actually block the flame front...Irridiums....I saw some that had an irridium tip bonded too the ground strap...Again it may be fine but what if the bond fails and you get that irridium tip between the piston and wall...

Myself I prefer a little hotter ignition box and just a regular old plug..a coil that spits lightening is nice too...
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Old 04-12-2012, 01:52 PM
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IMO - All of the special plug hype is just that - hype. I have found no plug that works any better than standard NGK's. Champion's are crap, with zero quality control (electrodes severely off center, and deformed ceramic). All of the others will drain your wallet faster, and the only other thing they *might* do, is foul quicker (common with iridium's or other precious metal plugs).
So, my advice, gathered from over 40 years of recreational riding of many different types and manufacturers of machines, under every kind of recreational condition, is to save your money for better proven mods, and run the NGK "standard" plug your machine was designed to run with.
Again, this is JMO.
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Old 04-12-2012, 05:33 PM
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NGK's is what I've been using for more that twenty-five years now. On my past motorcycles, cars, truck & now my atv & never have had any problem with them.

And they still look good, after I've replaced them.
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Old 04-13-2012, 08:34 AM
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I have seen the special "short" plugs that some KTM's spec go for almost $40 at a dealership. I believe that they were special, only because of fitment issues. The fuel tanks on these bikes hangs down very low, but a regular plug will fit.
I have also witnessed, many times, the precious metal plugs getting fouled with what looks like a tiny hair. I am not sure what this is, but it looks like a thin hair, or wire, that spans across the electrode to the ground strap. Once this happens, the plug will often refuse to fire again. These plugs seem to have an especially short life span when used in 2-stroke engines burning castor. Some MX bikes specify these plugs as OEM, but a normal plug will work just fine.
A normal "standard" NGK "ES" plug will cost around $2.50 these days, and should last for at least a year in a good working motor.
The Champion plugs that you see in Wal-Mart, or other stores, will work, but if you look closely at them, you will see many imperfections and quality issues that make me shy away from them. The electrode tip often looks like it was just "broken off" and not cut with any precision.
I have never realized any performance gain with the Splitfire, "E" plugs, or even the $8 precious metal plugs. The same goes for any of the "spark enhancers" that are pretty much just large capacitors that install in your HV lead. There is a newer one out now, but they all meet the same fate - they just fade into oblivion - for good reason.
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Old 04-13-2012, 10:13 AM
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I'm running a regular ngk right now. On my sports quad I was using ngk iridiums. I like the iridiums in that quad. It ran smoother, started easier as the yfz450 was cold blooded, and plugs lasted longer for me. I was planning on switching to iridium some time on the grizzly, just haven't done it yet.
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Old 04-13-2012, 10:21 AM
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Quote:
Originally Posted by srgrizzly700 View Post
I'm running a regular ngk right now. On my sports quad I was using ngk iridiums. I like the iridiums in that quad. It ran smoother, started easier as the yfz450 was cold blooded, and plugs lasted longer for me. I was planning on switching to iridium some time on the grizzly, just haven't done it yet.

My grizz is real cold blooded now after the BBK you think it might help me running one of those plugs ?
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Old 04-13-2012, 11:39 AM
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Quote:
Originally Posted by Grizz4x4 View Post
My grizz is real cold blooded now after the BBK you think it might help me running one of those plugs ?
It might. I like how the eletrode smaller. If you compare the spark between regular plug and iridium, the iridium spark is lot brighter. To me it would be worth a try. My yfz450 was just stock, but to me started in winter easier with iridium in it. With regular plug I ended up pull starting it more often the way it seemed.
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