These NGK Iridium plugs made a huge difference in my cbr600fy. Definitely rides and sounds much better. Don't waste your time and money on plugs that aren't Iridium. For a few quid more you'll notice the difference. I use to have a bit of a sticking point at 7000rpm. It felt like the bike held off for a split second then took off again. That's no longer there from i changed to ngk Iridiums.
Verified purchase: Yes | Condition: New
I wasn't sure about the extra cost of these spark plugs but when I looked into it the service schedule lists changing the standard plugs at 8000 mile intervals. As the iridium plugs last four to five times longer plus other benefits it made sense to use the better plugs, especially as access to them on my Honda VFR 800 is not easy, do it one time, not four. The engine appears to run more smoothly with slightly better power. Overall I'm very pleased.
Verified purchase: Yes | Condition: New
These Iridium spark plugs made a difference from the older NGK standard plugs. Good value good performance
Verified purchase: Yes | Condition: New
had a set in the bike 10 yrs .put a new set in . the performance vastly improved
Verified purchase: Yes | Condition: New
After installing plugs ,started first press of the button every time ,performance is crisp and smooth feels like it has more hp after replacing conventional plugs
Verified purchase: Yes | Condition: New
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