Never seen the spark bcause it usually happens inside the combustion chamber. Whatever it was I put these in, it ran and ran well! Also, being NKK, I had confidence in the brand.
Verified purchase: Yes | Condition: New
NOTE: These don't come with the bullet terminal shown in the photo and on the pack. They come with a naked thread which is just fine for most applications. For my BMW K1100, I need the bullet terminals which are built-in on the Bosch equivalents. Fortunately, my local motor factors had a supply in. Otherwise these towers of exotic porcelain and wrought metal are among the finest spark plugs I have ever screwed into a block.
Verified purchase: Yes | Condition: New
Dose what it is meant too and i have had no issues with my bike by using this product.
Verified purchase: Yes | Condition: New
First class
Verified purchase: Yes | Condition: New
Good
Verified purchase: Yes | Condition: New
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