NGK Iridium Spark Plug

[easyrider]

Are the claims true?

 

[kidloco]

No idea to be honest mate, but I always use them anyway. Does seem a bit crisper afterwards but that's prob more to do with the old ones being tired.

 

[MatteH Oxford]

More power, basically no. Longevity, we'll see..............they were only £1 more than standard plugs for my fireblade.

 

[lollyhayes]

No difference on my old CBR600, increases the service interval for them though.

 

[4T5]

From what I've read there is a benefit if you run a low powered 4 stroke as they don't get fouled up as often, I meant to try them last time but got standard ones in the end with some better NGK caps to go with them.
Bit different for me though as I am gradually swapping out the Chinese rubber so there is a gradual improvement as I swap the cheap stuff to decent stuff.

 

[englishpremier]

I prefer Denso to be honest - but yes Iridium plugs are worth it, if only because they don't need changing so often. I picked up a set for the ZX9R a little while ago for about £20 or less too, so at the price as standard ones, you might as well go for it.

 

[daisycutter]

+1 for iridium plugs, last longer and if i get anyother benefits then its a plus.