NGK DR8EIX Iridium IX Spark Plug, One Size

Starts and runs better!

Nice quality sparkplug.Fine tip iridium for long wear and seems to help my old Yamaha xt350 for better starting and to run a bit smoother all rpm’s.

Better spark means better starting

Tienenu un mejor encendido mi mortalika 250z

I debated getting these because I had read speculation that I'd need to get non-resistive plug caps since these plugs have built-in resistors. Honestly, perhaps the additional resistance might make a difference in terms of attenuating spark or intensity at much higher RPM than I tend to run, but I rarely exceed 7000RPM in my old Honda CM400C and I have noticed no weakness or decrease in performance at higher RPM. On the contrary, I love these plugs because they seem to start faster and more reliably, burn cleaner than the stock plugs, and deliver excellent and consistent performance and quick acceleration. They seem "forgiving" when the engine isn't tuned perfectly. I use them with the stock resistive caps. I think for most people, the higher resistance will not make any difference and is more of a consideration in terms of eliminating high frequency radio interference, not altering engine performance. These may be "overkill" for an old classic bike, but my expectation is that they will last longer and perform / start more consistently in a wider range of temperatures, paying off in the long run.

Excelente respuesta a encendido en frio

Bought this to replace the stock plug in a Hawk DLX EFI 250. Has worked fantastic and I am very pleased! Zero issues

I've recently changed to the Iridium plugs for my Honda XR200R. The bike starts on the first kick and hot restarts are a lot smoother.