Iridium IX Spark plugs 449-511

NGK Iridium IX Spark plugs Husqvarna 449-511

For many years NGK spark plugs has been the number one choice for offroad enthusiasts. The company uses many composites from standard copper core to platinum core. The Iridium IX spark plug is made with precious metal which is in a white and silver color. With the natural elements of IRIDIUM, NGK was able to create the best spark plugs on the market.

The results are:
- Spark plugs that require less voltage to spark.
- Burns fuel more efficiently.
- Sparks at leaner air/fuel mixtures.
- Delivers higher horsepower and better gas mileage.

IRIDIUM IX Spark plug can be installed on any engine using Standard or platinum plugs.
A-New 0.6mm Iridium center electrode reduces voltage requirements and extends ignition system life.B-New metal shell plating has excellent anti-corrosion qualities.

NGK CR9EIX (3521) is the Iridium spark plug

NGK CR9EKB is the standard plug for 449/511

I have one in my 449. Iridium, it works great!
I heard that Lithium Crystals are even better good luck finding that!

I've always run NGK in all my cars and vehicles. We always spec-ed them in our Mitsubishi EVOs and never had an issue. thanx for the part #!

Don't use Lithium Crystals, they will cause your piston to melt.
Dilithium Crystals are the proper additive to achieve warp speed.

Ha ha......a Trekie. Love it. BTW "The Next Generation" Best show ever......
I've used Iridium plugs in my 610 (NGK and Denso) with good results.
Tinken, are you using an Iridium plug in your 511 ? If so, did it make a difference and
is it a bitch to change on these bikes ?

W

WalMart was out of Dilithium crystals so I converted mine to a Flux Capacitor. If you want to do yours the part number is 4QDMV.

Hahaha

They are the real deal. The electrode basically never wears out. If you look at one that has been in service for a long time, the electrode looks great, but the underside of the groundstrap is eroded.

I'd be "shocked" if you can feel the difference on a stock/lightly modified motor, unless the plug you are replacing is already used up.

Whaat is the standard issue, CR9E or CR9EK?

Really ? Cool, that's fabulous that there is such an easy, cheap fix! There are some odd combinations out there that favor one plug over another.

NGK Iridium IX Spark plug was placed into my SMR 449 (mine is for race only) and first thing I noticed was how quick it started from cold!
I've just installed one into my inverter generator as well(cheap china one) and same deal, starts heaps easier but also runs lots better!

VERY good point also. Because of the mentioned temp, and the lower firing voltage required they are less likely to find an easier ground path (FOUL!!).

They are Not recommended to be used in 2T. There is a reason why & I will find it. I can tell you its not good.

CR9EKB is standard for 449/511

I replaced a new plug and noticed a difference starting cold and smoother running across the powerband. No noticeable power difference.

I can't find the reason why, but part of it is they run to hot for 2t

3 hp increase on a Harley NGK vs NGK iridium


View: http://youtu.be/0A9_7RtFoZ4

The actual heat measurement of a spark plug is determined by the amount of thermal conductivity a spark plug can release to the out side of the cylinder. As long as you match up the correct heat ranges, the iridium should work really well in two stroke engines, especially for firing through oil mixtures.

http://www.sixity.com/catalog/produ...k-plug-trailblazer-2-stroke-platinum-iridium/