NGK (4218) CR8EIX Iridium IX Spark Plug, Pack of 1

I was surprised how much difference these plugs made as an uprade to the standard NGKs I had been using before (Yamaha XJ600S). Better cold starting, smoother running, improved throttle response, and a more powerful feel to the engine. It would be interesting to do some kind of A/B performance comparison, but the effect is certainly enough to be noticeable, whatever the measured difference might turn out to be.I'll need to go a few months before I get a clear idea of how they affect MPG (something I can and do measure), but on performance alone I won't be going back to standard plugs.

Exactly what I need. A word of notice is that there is a small cap screwed into the top of the spark plug. You will need to remove it before inserting the plug into the chamber or it'll be a lot of work to take it out (ask me why I know).

Used on YZF-R125 2014 works perfectly just remember to sake the cap off and use some copper grease

Dopo varie tribolazioni, analisi di post su vari forum e ricerche su youtube ho finalmente comprato questa candela. Vorrei averlo fatto prima: a fronte di un costo poco più alto di una candel tradizionale la differenza si sente (soprattutto nelle ripartenze) e l'accensione è più sicura, anche nelle giornate fredde. Se la montate su una Royal Enfield Himalayan ricordatevi di smontare la capocchia con cui arriva (basta stringere con una pinza e ruotare per farla venire via) prima di montarla sulla moto, in quanto altrimenti la pipetta non riesce a fare bene contatto con la candela.Hai trovato questa recensione utile? Clikka qui sotto!

I bought this plug for my single cylinder Honda MSX125SF and enjoyed marginal but noticeable better engine characteristics. I have used iridium-tipped plugs on other multi-cylinder motorcycles with nothing really changing, but on the 125 it really helped.One universal benefit I have found with all plugs of this type is that they do seem to last forever and never need re-gapping.