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

Works well, fits my 2008 Yfz450. Top has to be screwed off to reveal smaller contact. Not too sure about the longevity

I own three motorcycles. When it is time to change out the plugs, I always pay the extra money and buy Iridium plugs. They cost anywhere from $7-$10 each, so they are not cheap, but I want my bike running perfect and purring like a cat while riding a short distance through the mountains or taking off across country. No hassles, no problems. My bike starts first time, everytime, runs smooth, great mileage and no problems while away from home. So, are these worth the price difference? Because I ride about 20,000 miles yearly, I would rather pay the difference for idea plugs and enjoy worry free riding instead of possibly having a break-down somewhere far from home. They give me piece of mind. Money well spent. Buying NGK is a personal preference. I have used NGK in my street-bikes, ATV's and in my younger years I used NGK in my dirt bikes. I'm content with their performance and longevity.UPDATE: I just purchased my second set of these NGK CR8EIX plugs for my 2008 Yamaha FJR1300. They work great in my street bike, I also put them in both ATV's, my 2012 Yamaha WR450F and my Suzuki 650 Burgman. I prefer these plugs because they don't foul under any circumstances. I am replacing these after 24,000 miles in my FJR simply because I am preparing my bike for a long road trip, so regardless of how long they may last, I want new plugs for this trip. I consider it just one additional step in my preparation for a long road trip and don't want to have any interruptions of any kind. Cost, yes they are a few extra dollars, but so what. If you can't afford to run the best, perhaps you should consider changing your lifestyle! Do you pay a little extra for a better air filter, better tires, better riding gear, then don't sweat the small stuff, take care of your machine so it can take care of you!

Excellent product

So far so good!

Upgraded to these and a gboost belt and went from 102mph topspeed to 108. The plugs provide a better spark for a more complete burn. Engine runs smoother

Simple upgrade for a ton of plus. The bike behave better and with the Air intake and exhaust upgrades, this is a must. I just had to remove the terminal stud to get access to the terminal nut for my motorcycle (grab a plier and unscrew it). Recommended 100%

The iridium spark plug is an upgrade to the original spark plug. If your scooter calls for CR8EB, then you can get this for a small performance and durability upgrade when it comes time to replace your spark plugs.

Tengo una Vespa 300 Super Sport normalmente viene con bujía CR8EKB, pero le puse la bujia de Iridio y el comportamiento fue mucho mejor, muy recomendada para este tipo de scooter italiano.