[ST-DocLizard1]

FYI. Looks legit to me. Hence, I will try a set at the next plug change on the ST1300. Two Brothers got me a set of four at $35.00 shipped.

Iridium spark plugs by NGK and Denso

I think at the very least you may get more life with less changes. I don't feature going in after plug #3 on the 919 if I don't have to.




Doc

 

[support_six]

I think at the very least you may get more life with less changes. I don't feature going in after plug #3 on the 919 if I don't have to.

Doc

I installed them because they last longer, not because they perform better. However, I guess you could say the perform better as the standard plugs age and wear.

 

[lobo]

the only thing iridium plugs do is last longer .like 200,000 miles in a chevy tahoe.i seen it myself .no performance improvement .

 

[outdoorgb]

the only thing iridium plugs do is last longer .like 200,000 miles in a chevy tahoe.i seen it myself .no performance improvement .

Not sure about the 919...but on both of my Toyota vehicles iridium does make a differnce in life. Camry - owners manual lists 90K using Denso iridium ($12 each), Tacoma - 30K using non-iridium ($3.50 each)...

In all of my rigs I always replace with OEM.

 

[curiousmike]

Replacing plugs seems superfluous; i'll experiment and be the guy who never changes his plugs. I'll let you know what foul thing happens to me.

 

[curiousmike]

Get it? "foul" thing?
hhahahahahaha

 

[g00gl3it]

Get it? "foul" thing?
hhahahahahaha

yes, you are very 'punny'... :whistling:

 

[outdoorgb]

What are the signs of a fouled plug(s)?
I remember what it feels like a single cylinder Kawi way back when...but what about a big four cylinder?

 

[Marosh19]

I bought my bike with 15000 miles on it and I changed my plugs at 45000 miles. They looked bad but bike ran ok. After so many miles you will feel difference, now I am approaching 70k and changing them again...